diff --git a/common/src/main/java/com/kt/event/common/security/JwtTokenProvider.java b/common/src/main/java/com/kt/event/common/security/JwtTokenProvider.java
index 968ae9d..eb5b185 100644
--- a/common/src/main/java/com/kt/event/common/security/JwtTokenProvider.java
+++ b/common/src/main/java/com/kt/event/common/security/JwtTokenProvider.java
@@ -12,7 +12,6 @@ import javax.crypto.SecretKey;
 import java.nio.charset.StandardCharsets;
 import java.util.Date;
 import java.util.List;
-import java.util.UUID;
 
 /**
  * JWT 토큰 생성 및 검증 제공자
@@ -57,13 +56,13 @@ public class JwtTokenProvider {
      * @return Access Token
      */
 
-    public String createAccessToken(UUID userId, UUID storeId, String email, String name, List<String> roles) {
+    public String createAccessToken(String userId, String storeId, String email, String name, List<String> roles) {
         Date now = new Date();
         Date expiryDate = new Date(now.getTime() + accessTokenValidityMs);
 
         return Jwts.builder()
-                .subject(userId.toString())
-                .claim("storeId", storeId != null ? storeId.toString() : null)
+                .subject(userId)
+                .claim("storeId", storeId)
                 .claim("email", email)
                 .claim("name", name)
                 .claim("roles", roles)
@@ -80,12 +79,12 @@ public class JwtTokenProvider {
      * @param userId 사용자 ID
      * @return Refresh Token
      */
-    public String createRefreshToken(UUID userId) {
+    public String createRefreshToken(String userId) {
         Date now = new Date();
         Date expiryDate = new Date(now.getTime() + refreshTokenValidityMs);
 
         return Jwts.builder()
-                .subject(userId.toString())
+                .subject(userId)
                 .claim("type", "refresh")
                 .issuedAt(now)
                 .expiration(expiryDate)
@@ -99,9 +98,9 @@ public class JwtTokenProvider {
      * @param token JWT 토큰
      * @return 사용자 ID
      */
-    public UUID getUserIdFromToken(String token) {
+    public String getUserIdFromToken(String token) {
         Claims claims = parseToken(token);
-        return UUID.fromString(claims.getSubject());
+        return claims.getSubject();
     }
 
     /**
@@ -113,9 +112,8 @@ public class JwtTokenProvider {
     public UserPrincipal getUserPrincipalFromToken(String token) {
         Claims claims = parseToken(token);
 
-        UUID userId = UUID.fromString(claims.getSubject());
-        String storeIdStr = claims.get("storeId", String.class);
-        UUID storeId = storeIdStr != null ? UUID.fromString(storeIdStr) : null;
+        String userId = claims.getSubject();
+        String storeId = claims.get("storeId", String.class);
         String email = claims.get("email", String.class);
         String name = claims.get("name", String.class);
         @SuppressWarnings("unchecked")
diff --git a/common/src/main/java/com/kt/event/common/security/UserPrincipal.java b/common/src/main/java/com/kt/event/common/security/UserPrincipal.java
index ff99809..ad10ba4 100644
--- a/common/src/main/java/com/kt/event/common/security/UserPrincipal.java
+++ b/common/src/main/java/com/kt/event/common/security/UserPrincipal.java
@@ -9,7 +9,6 @@ import org.springframework.security.core.userdetails.UserDetails;
 
 import java.util.Collection;
 import java.util.List;
-import java.util.UUID;
 import java.util.stream.Collectors;
 
 /**
@@ -24,12 +23,12 @@ public class UserPrincipal implements UserDetails {
     /**
      * 사용자 ID
      */
-    private final UUID userId;
+    private final String userId;
 
     /**
      * 매장 ID
      */
-    private final UUID storeId;
+    private final String storeId;
 
     /**
      * 사용자 이메일
diff --git a/develop/database/migration/alter_event_id_to_varchar.sql b/develop/database/migration/alter_event_id_to_varchar.sql
new file mode 100644
index 0000000..017f2a5
--- /dev/null
+++ b/develop/database/migration/alter_event_id_to_varchar.sql
@@ -0,0 +1,234 @@
+-- ====================================================================================================
+-- Event ID 타입 변경 DDL (UUID → VARCHAR(50)) - PostgreSQL
+-- ====================================================================================================
+-- 작성일: 2025-10-29
+-- 작성자: Backend Development Team
+-- 설명: Event 엔티티의 eventId가 String 타입으로 변경됨에 따라 관련 테이블들의 event_id 컬럼 타입을 UUID에서 VARCHAR(50)으로 변경합니다.
+-- 영향 범위:
+--   - events 테이블 (Primary Key)
+--   - event_channels 테이블 (Foreign Key)
+--   - generated_images 테이블 (Foreign Key)
+--   - ai_recommendations 테이블 (Foreign Key)
+--   - jobs 테이블 (Foreign Key)
+-- ====================================================================================================
+
+-- 0. 현재 상태 확인 (실행 전 확인용)
+-- ====================================================================================================
+-- 각 테이블의 event_id 컬럼 타입 확인
+-- SELECT table_name, column_name, data_type
+-- FROM information_schema.columns
+-- WHERE column_name = 'event_id'
+-- AND table_schema = 'public'
+-- ORDER BY table_name;
+
+-- event_id 관련 모든 외래키 제약조건 확인
+-- SELECT
+--     tc.constraint_name,
+--     tc.table_name,
+--     kcu.column_name,
+--     ccu.table_name AS foreign_table_name,
+--     ccu.column_name AS foreign_column_name
+-- FROM information_schema.table_constraints AS tc
+-- JOIN information_schema.key_column_usage AS kcu
+--     ON tc.constraint_name = kcu.constraint_name
+--     AND tc.table_schema = kcu.table_schema
+-- JOIN information_schema.constraint_column_usage AS ccu
+--     ON ccu.constraint_name = tc.constraint_name
+--     AND ccu.table_schema = tc.table_schema
+-- WHERE tc.constraint_type = 'FOREIGN KEY'
+-- AND kcu.column_name = 'event_id'
+-- AND tc.table_schema = 'public';
+
+-- 1. 외래키 제약조건 전체 제거
+-- ====================================================================================================
+-- JPA가 자동 생성한 제약조건 이름도 포함하여 모두 제거
+
+-- event_channels 테이블의 모든 event_id 관련 외래키 제거
+DO $$
+DECLARE
+    constraint_name TEXT;
+BEGIN
+    FOR constraint_name IN
+        SELECT tc.constraint_name
+        FROM information_schema.table_constraints AS tc
+        JOIN information_schema.key_column_usage AS kcu
+            ON tc.constraint_name = kcu.constraint_name
+        WHERE tc.constraint_type = 'FOREIGN KEY'
+        AND tc.table_name = 'event_channels'
+        AND kcu.column_name = 'event_id'
+        AND tc.table_schema = 'public'
+    LOOP
+        EXECUTE 'ALTER TABLE event_channels DROP CONSTRAINT IF EXISTS ' || constraint_name;
+    END LOOP;
+END $$;
+
+-- generated_images 테이블의 모든 event_id 관련 외래키 제거
+DO $$
+DECLARE
+    constraint_name TEXT;
+BEGIN
+    FOR constraint_name IN
+        SELECT tc.constraint_name
+        FROM information_schema.table_constraints AS tc
+        JOIN information_schema.key_column_usage AS kcu
+            ON tc.constraint_name = kcu.constraint_name
+        WHERE tc.constraint_type = 'FOREIGN KEY'
+        AND tc.table_name = 'generated_images'
+        AND kcu.column_name = 'event_id'
+        AND tc.table_schema = 'public'
+    LOOP
+        EXECUTE 'ALTER TABLE generated_images DROP CONSTRAINT IF EXISTS ' || constraint_name;
+    END LOOP;
+END $$;
+
+-- ai_recommendations 테이블의 모든 event_id 관련 외래키 제거
+DO $$
+DECLARE
+    constraint_name TEXT;
+BEGIN
+    FOR constraint_name IN
+        SELECT tc.constraint_name
+        FROM information_schema.table_constraints AS tc
+        JOIN information_schema.key_column_usage AS kcu
+            ON tc.constraint_name = kcu.constraint_name
+        WHERE tc.constraint_type = 'FOREIGN KEY'
+        AND tc.table_name = 'ai_recommendations'
+        AND kcu.column_name = 'event_id'
+        AND tc.table_schema = 'public'
+    LOOP
+        EXECUTE 'ALTER TABLE ai_recommendations DROP CONSTRAINT IF EXISTS ' || constraint_name;
+    END LOOP;
+END $$;
+
+-- jobs 테이블의 모든 event_id 관련 외래키 제거
+DO $$
+DECLARE
+    constraint_name TEXT;
+BEGIN
+    FOR constraint_name IN
+        SELECT tc.constraint_name
+        FROM information_schema.table_constraints AS tc
+        JOIN information_schema.key_column_usage AS kcu
+            ON tc.constraint_name = kcu.constraint_name
+        WHERE tc.constraint_type = 'FOREIGN KEY'
+        AND tc.table_name = 'jobs'
+        AND kcu.column_name = 'event_id'
+        AND tc.table_schema = 'public'
+    LOOP
+        EXECUTE 'ALTER TABLE jobs DROP CONSTRAINT IF EXISTS ' || constraint_name;
+    END LOOP;
+END $$;
+
+
+-- 2. 컬럼 타입 변경 (UUID/기타 → VARCHAR)
+-- ====================================================================================================
+-- 현재 타입에 관계없이 VARCHAR(50)으로 변환
+-- UUID, BIGINT 등 모든 타입을 텍스트로 변환
+
+-- events 테이블의 event_id 컬럼 타입 변경 (Primary Key)
+DO $$
+BEGIN
+    ALTER TABLE events ALTER COLUMN event_id TYPE VARCHAR(50) USING event_id::text;
+EXCEPTION
+    WHEN OTHERS THEN
+        RAISE NOTICE 'events.event_id 변환 중 오류: %', SQLERRM;
+END $$;
+
+-- event_channels 테이블의 event_id 컬럼 타입 변경
+DO $$
+BEGIN
+    ALTER TABLE event_channels ALTER COLUMN event_id TYPE VARCHAR(50) USING event_id::text;
+EXCEPTION
+    WHEN OTHERS THEN
+        RAISE NOTICE 'event_channels.event_id 변환 중 오류: %', SQLERRM;
+END $$;
+
+-- generated_images 테이블의 event_id 컬럼 타입 변경
+DO $$
+BEGIN
+    ALTER TABLE generated_images ALTER COLUMN event_id TYPE VARCHAR(50) USING event_id::text;
+EXCEPTION
+    WHEN OTHERS THEN
+        RAISE NOTICE 'generated_images.event_id 변환 중 오류: %', SQLERRM;
+END $$;
+
+-- ai_recommendations 테이블의 event_id 컬럼 타입 변경
+DO $$
+BEGIN
+    ALTER TABLE ai_recommendations ALTER COLUMN event_id TYPE VARCHAR(50) USING event_id::text;
+EXCEPTION
+    WHEN OTHERS THEN
+        RAISE NOTICE 'ai_recommendations.event_id 변환 중 오류: %', SQLERRM;
+END $$;
+
+-- jobs 테이블의 event_id 컬럼 타입 변경 (NULL 허용)
+DO $$
+BEGIN
+    ALTER TABLE jobs ALTER COLUMN event_id TYPE VARCHAR(50) USING event_id::text;
+EXCEPTION
+    WHEN OTHERS THEN
+        RAISE NOTICE 'jobs.event_id 변환 중 오류: %', SQLERRM;
+END $$;
+
+
+-- 3. 외래키 제약조건 재생성
+-- ====================================================================================================
+
+-- event_channels 테이블의 외래키 재생성
+ALTER TABLE event_channels
+ADD CONSTRAINT fk_event_channels_event
+FOREIGN KEY (event_id) REFERENCES events(event_id)
+ON DELETE CASCADE;
+
+-- generated_images 테이블의 외래키 재생성
+ALTER TABLE generated_images
+ADD CONSTRAINT fk_generated_images_event
+FOREIGN KEY (event_id) REFERENCES events(event_id)
+ON DELETE CASCADE;
+
+-- ai_recommendations 테이블의 외래키 재생성
+ALTER TABLE ai_recommendations
+ADD CONSTRAINT fk_ai_recommendations_event
+FOREIGN KEY (event_id) REFERENCES events(event_id)
+ON DELETE CASCADE;
+
+-- jobs 테이블의 외래키 재생성
+ALTER TABLE jobs
+ADD CONSTRAINT fk_jobs_event
+FOREIGN KEY (event_id) REFERENCES events(event_id)
+ON DELETE SET NULL;
+
+
+-- 4. 인덱스 확인 (옵션)
+-- ====================================================================================================
+-- 기존 인덱스들이 자동으로 유지되는지 확인
+-- \d events
+-- \d event_channels
+-- \d generated_images
+-- \d ai_recommendations
+-- \d jobs
+
+
+-- ====================================================================================================
+-- 롤백 스크립트 (필요시 사용)
+-- ====================================================================================================
+/*
+-- 1. 외래키 제약조건 제거
+ALTER TABLE event_channels DROP CONSTRAINT IF EXISTS fk_event_channels_event;
+ALTER TABLE generated_images DROP CONSTRAINT IF EXISTS fk_generated_images_event;
+ALTER TABLE ai_recommendations DROP CONSTRAINT IF EXISTS fk_ai_recommendations_event;
+ALTER TABLE jobs DROP CONSTRAINT IF EXISTS fk_jobs_event;
+
+-- 2. 컬럼 타입 원복 (VARCHAR → UUID)
+ALTER TABLE events ALTER COLUMN event_id TYPE UUID USING event_id::UUID;
+ALTER TABLE event_channels ALTER COLUMN event_id TYPE UUID USING event_id::UUID;
+ALTER TABLE generated_images ALTER COLUMN event_id TYPE UUID USING event_id::UUID;
+ALTER TABLE ai_recommendations ALTER COLUMN event_id TYPE UUID USING event_id::UUID;
+ALTER TABLE jobs ALTER COLUMN event_id TYPE UUID USING event_id::UUID;
+
+-- 4. 외래키 제약조건 재생성
+ALTER TABLE event_channels ADD CONSTRAINT fk_event_channels_event FOREIGN KEY (event_id) REFERENCES events(event_id) ON DELETE CASCADE;
+ALTER TABLE generated_images ADD CONSTRAINT fk_generated_images_event FOREIGN KEY (event_id) REFERENCES events(event_id) ON DELETE CASCADE;
+ALTER TABLE ai_recommendations ADD CONSTRAINT fk_ai_recommendations_event FOREIGN KEY (event_id) REFERENCES events(event_id) ON DELETE CASCADE;
+ALTER TABLE jobs ADD CONSTRAINT fk_jobs_event FOREIGN KEY (event_id) REFERENCES events(event_id) ON DELETE SET NULL;
+*/
diff --git a/develop/database/schema/create_event_tables.sql b/develop/database/schema/create_event_tables.sql
new file mode 100644
index 0000000..59a4887
--- /dev/null
+++ b/develop/database/schema/create_event_tables.sql
@@ -0,0 +1,233 @@
+-- ====================================================================================================
+-- Event Service 테이블 생성 스크립트 - PostgreSQL
+-- ====================================================================================================
+-- 작성일: 2025-10-29
+-- 작성자: Backend Development Team
+-- 설명: Event 서비스의 모든 테이블을 생성합니다.
+-- 참고: FK(Foreign Key) 제약조건은 제외되어 있습니다.
+-- ====================================================================================================
+
+-- ====================================================================================================
+-- 1. events 테이블 - 이벤트 메인 테이블
+-- ====================================================================================================
+CREATE TABLE IF NOT EXISTS events (
+    event_id VARCHAR(50) PRIMARY KEY,
+    user_id VARCHAR(50) NOT NULL,
+    store_id VARCHAR(50) NOT NULL,
+    event_name VARCHAR(200),
+    description TEXT,
+    objective VARCHAR(100) NOT NULL,
+    start_date DATE,
+    end_date DATE,
+    status VARCHAR(20) NOT NULL DEFAULT 'DRAFT',
+    selected_image_id VARCHAR(50),
+    selected_image_url VARCHAR(500),
+    participants INTEGER DEFAULT 0,
+    target_participants INTEGER,
+    roi DOUBLE PRECISION DEFAULT 0.0,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+-- events 테이블 인덱스
+CREATE INDEX IF NOT EXISTS idx_events_user_id ON events(user_id);
+CREATE INDEX IF NOT EXISTS idx_events_store_id ON events(store_id);
+CREATE INDEX IF NOT EXISTS idx_events_status ON events(status);
+CREATE INDEX IF NOT EXISTS idx_events_created_at ON events(created_at);
+
+COMMENT ON TABLE events IS '이벤트 메인 테이블';
+COMMENT ON COLUMN events.event_id IS '이벤트 ID (Primary Key)';
+COMMENT ON COLUMN events.user_id IS '사용자 ID';
+COMMENT ON COLUMN events.store_id IS '상점 ID';
+COMMENT ON COLUMN events.event_name IS '이벤트명';
+COMMENT ON COLUMN events.description IS '이벤트 설명';
+COMMENT ON COLUMN events.objective IS '이벤트 목적';
+COMMENT ON COLUMN events.start_date IS '이벤트 시작일';
+COMMENT ON COLUMN events.end_date IS '이벤트 종료일';
+COMMENT ON COLUMN events.status IS '이벤트 상태 (DRAFT, PUBLISHED, ENDED)';
+COMMENT ON COLUMN events.selected_image_id IS '선택된 이미지 ID';
+COMMENT ON COLUMN events.selected_image_url IS '선택된 이미지 URL';
+COMMENT ON COLUMN events.participants IS '참여자 수';
+COMMENT ON COLUMN events.target_participants IS '목표 참여자 수';
+COMMENT ON COLUMN events.roi IS 'ROI (투자 대비 수익률)';
+COMMENT ON COLUMN events.created_at IS '생성일시';
+COMMENT ON COLUMN events.updated_at IS '수정일시';
+
+
+-- ====================================================================================================
+-- 2. event_channels 테이블 - 이벤트 배포 채널 (ElementCollection)
+-- ====================================================================================================
+CREATE TABLE IF NOT EXISTS event_channels (
+    event_id VARCHAR(50) NOT NULL,
+    channel VARCHAR(50)
+);
+
+-- event_channels 테이블 인덱스
+CREATE INDEX IF NOT EXISTS idx_event_channels_event_id ON event_channels(event_id);
+
+COMMENT ON TABLE event_channels IS '이벤트 배포 채널 테이블';
+COMMENT ON COLUMN event_channels.event_id IS '이벤트 ID';
+COMMENT ON COLUMN event_channels.channel IS '배포 채널명';
+
+
+-- ====================================================================================================
+-- 3. generated_images 테이블 - 생성된 이미지
+-- ====================================================================================================
+CREATE TABLE IF NOT EXISTS generated_images (
+    image_id VARCHAR(50) PRIMARY KEY,
+    event_id VARCHAR(50) NOT NULL,
+    image_url VARCHAR(500) NOT NULL,
+    style VARCHAR(50),
+    platform VARCHAR(50),
+    is_selected BOOLEAN NOT NULL DEFAULT false,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+-- generated_images 테이블 인덱스
+CREATE INDEX IF NOT EXISTS idx_generated_images_event_id ON generated_images(event_id);
+CREATE INDEX IF NOT EXISTS idx_generated_images_is_selected ON generated_images(is_selected);
+
+COMMENT ON TABLE generated_images IS 'AI가 생성한 이미지 테이블';
+COMMENT ON COLUMN generated_images.image_id IS '이미지 ID (Primary Key)';
+COMMENT ON COLUMN generated_images.event_id IS '이벤트 ID';
+COMMENT ON COLUMN generated_images.image_url IS '이미지 URL';
+COMMENT ON COLUMN generated_images.style IS '이미지 스타일';
+COMMENT ON COLUMN generated_images.platform IS '타겟 플랫폼';
+COMMENT ON COLUMN generated_images.is_selected IS '선택 여부';
+COMMENT ON COLUMN generated_images.created_at IS '생성일시';
+COMMENT ON COLUMN generated_images.updated_at IS '수정일시';
+
+
+-- ====================================================================================================
+-- 4. ai_recommendations 테이블 - AI 추천 기획안
+-- ====================================================================================================
+CREATE TABLE IF NOT EXISTS ai_recommendations (
+    recommendation_id VARCHAR(50) PRIMARY KEY,
+    event_id VARCHAR(50) NOT NULL,
+    event_name VARCHAR(200) NOT NULL,
+    description TEXT,
+    promotion_type VARCHAR(50),
+    target_audience VARCHAR(100),
+    is_selected BOOLEAN NOT NULL DEFAULT false,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+-- ai_recommendations 테이블 인덱스
+CREATE INDEX IF NOT EXISTS idx_ai_recommendations_event_id ON ai_recommendations(event_id);
+CREATE INDEX IF NOT EXISTS idx_ai_recommendations_is_selected ON ai_recommendations(is_selected);
+
+COMMENT ON TABLE ai_recommendations IS 'AI 추천 이벤트 기획안 테이블';
+COMMENT ON COLUMN ai_recommendations.recommendation_id IS '추천 ID (Primary Key)';
+COMMENT ON COLUMN ai_recommendations.event_id IS '이벤트 ID';
+COMMENT ON COLUMN ai_recommendations.event_name IS '추천 이벤트명';
+COMMENT ON COLUMN ai_recommendations.description IS '추천 설명';
+COMMENT ON COLUMN ai_recommendations.promotion_type IS '프로모션 유형';
+COMMENT ON COLUMN ai_recommendations.target_audience IS '타겟 고객층';
+COMMENT ON COLUMN ai_recommendations.is_selected IS '선택 여부';
+COMMENT ON COLUMN ai_recommendations.created_at IS '생성일시';
+COMMENT ON COLUMN ai_recommendations.updated_at IS '수정일시';
+
+
+-- ====================================================================================================
+-- 5. jobs 테이블 - 비동기 작업 관리
+-- ====================================================================================================
+CREATE TABLE IF NOT EXISTS jobs (
+    job_id VARCHAR(50) PRIMARY KEY,
+    event_id VARCHAR(50) NOT NULL,
+    job_type VARCHAR(30) NOT NULL,
+    status VARCHAR(20) NOT NULL DEFAULT 'PENDING',
+    progress INTEGER NOT NULL DEFAULT 0,
+    result_key VARCHAR(200),
+    error_message VARCHAR(500),
+    completed_at TIMESTAMP,
+    retry_count INTEGER NOT NULL DEFAULT 0,
+    max_retry_count INTEGER NOT NULL DEFAULT 3,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+-- jobs 테이블 인덱스
+CREATE INDEX IF NOT EXISTS idx_jobs_event_id ON jobs(event_id);
+CREATE INDEX IF NOT EXISTS idx_jobs_status ON jobs(status);
+CREATE INDEX IF NOT EXISTS idx_jobs_job_type ON jobs(job_type);
+CREATE INDEX IF NOT EXISTS idx_jobs_created_at ON jobs(created_at);
+
+COMMENT ON TABLE jobs IS '비동기 작업 관리 테이블';
+COMMENT ON COLUMN jobs.job_id IS '작업 ID (Primary Key)';
+COMMENT ON COLUMN jobs.event_id IS '이벤트 ID';
+COMMENT ON COLUMN jobs.job_type IS '작업 유형 (AI_RECOMMENDATION, IMAGE_GENERATION)';
+COMMENT ON COLUMN jobs.status IS '작업 상태 (PENDING, PROCESSING, COMPLETED, FAILED)';
+COMMENT ON COLUMN jobs.progress IS '진행률 (0-100)';
+COMMENT ON COLUMN jobs.result_key IS '결과 키';
+COMMENT ON COLUMN jobs.error_message IS '에러 메시지';
+COMMENT ON COLUMN jobs.completed_at IS '완료일시';
+COMMENT ON COLUMN jobs.retry_count IS '재시도 횟수';
+COMMENT ON COLUMN jobs.max_retry_count IS '최대 재시도 횟수';
+COMMENT ON COLUMN jobs.created_at IS '생성일시';
+COMMENT ON COLUMN jobs.updated_at IS '수정일시';
+
+
+-- ====================================================================================================
+-- 6. updated_at 자동 업데이트를 위한 트리거 함수 생성
+-- ====================================================================================================
+CREATE OR REPLACE FUNCTION update_updated_at_column()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = CURRENT_TIMESTAMP;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- ====================================================================================================
+-- 7. 각 테이블에 updated_at 자동 업데이트 트리거 적용
+-- ====================================================================================================
+
+-- events 테이블 트리거
+DROP TRIGGER IF EXISTS update_events_updated_at ON events;
+CREATE TRIGGER update_events_updated_at
+    BEFORE UPDATE ON events
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();
+
+-- generated_images 테이블 트리거
+DROP TRIGGER IF EXISTS update_generated_images_updated_at ON generated_images;
+CREATE TRIGGER update_generated_images_updated_at
+    BEFORE UPDATE ON generated_images
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();
+
+-- ai_recommendations 테이블 트리거
+DROP TRIGGER IF EXISTS update_ai_recommendations_updated_at ON ai_recommendations;
+CREATE TRIGGER update_ai_recommendations_updated_at
+    BEFORE UPDATE ON ai_recommendations
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();
+
+-- jobs 테이블 트리거
+DROP TRIGGER IF EXISTS update_jobs_updated_at ON jobs;
+CREATE TRIGGER update_jobs_updated_at
+    BEFORE UPDATE ON jobs
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();
+
+
+-- ====================================================================================================
+-- 완료 메시지
+-- ====================================================================================================
+DO $$
+BEGIN
+    RAISE NOTICE '=================================================';
+    RAISE NOTICE 'Event Service 테이블 생성이 완료되었습니다.';
+    RAISE NOTICE '=================================================';
+    RAISE NOTICE '생성된 테이블:';
+    RAISE NOTICE '  1. events - 이벤트 메인 테이블';
+    RAISE NOTICE '  2. event_channels - 이벤트 배포 채널';
+    RAISE NOTICE '  3. generated_images - 생성된 이미지';
+    RAISE NOTICE '  4. ai_recommendations - AI 추천 기획안';
+    RAISE NOTICE '  5. jobs - 비동기 작업 관리';
+    RAISE NOTICE '=================================================';
+    RAISE NOTICE '참고: FK 제약조건은 생성되지 않았습니다.';
+    RAISE NOTICE '=================================================';
+END $$;
diff --git a/event-service/src/main/java/com/kt/event/eventservice/application/dto/kafka/EventCreatedMessage.java b/event-service/src/main/java/com/kt/event/eventservice/application/dto/kafka/EventCreatedMessage.java
index 75560c0..6ceebfe 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/application/dto/kafka/EventCreatedMessage.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/application/dto/kafka/EventCreatedMessage.java
@@ -7,7 +7,6 @@ import lombok.Data;
 import lombok.NoArgsConstructor;
 
 import java.time.LocalDateTime;
-import java.util.UUID;
 
 /**
  * 이벤트 생성 완료 메시지 DTO
@@ -21,16 +20,16 @@ import java.util.UUID;
 public class EventCreatedMessage {
 
     /**
-     * 이벤트 ID (UUID)
+     * 이벤트 ID
      */
     @JsonProperty("event_id")
-    private UUID eventId;
+    private String eventId;
 
     /**
-     * 사용자 ID (UUID)
+     * 사용자 ID
      */
     @JsonProperty("user_id")
-    private UUID userId;
+    private String userId;
 
     /**
      * 이벤트 제목
diff --git a/event-service/src/main/java/com/kt/event/eventservice/application/dto/request/AiRecommendationRequest.java b/event-service/src/main/java/com/kt/event/eventservice/application/dto/request/AiRecommendationRequest.java
index 8c94bea..82bc185 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/application/dto/request/AiRecommendationRequest.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/application/dto/request/AiRecommendationRequest.java
@@ -8,8 +8,6 @@ import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
-import java.util.UUID;
-
 /**
  * AI 추천 요청 DTO
  *
@@ -42,8 +40,8 @@ public class AiRecommendationRequest {
     public static class StoreInfo {
 
         @NotNull(message = "매장 ID는 필수입니다.")
-        @Schema(description = "매장 ID", required = true, example = "550e8400-e29b-41d4-a716-446655440002")
-        private UUID storeId;
+        @Schema(description = "매장 ID", required = true, example = "str_20250124_001")
+        private String storeId;
 
         @NotNull(message = "매장명은 필수입니다.")
         @Schema(description = "매장명", required = true, example = "우진네 고깃집")
diff --git a/event-service/src/main/java/com/kt/event/eventservice/application/dto/request/SelectImageRequest.java b/event-service/src/main/java/com/kt/event/eventservice/application/dto/request/SelectImageRequest.java
index 23562fb..891b3d6 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/application/dto/request/SelectImageRequest.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/application/dto/request/SelectImageRequest.java
@@ -6,8 +6,6 @@ import lombok.Builder;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
-import java.util.UUID;
-
 /**
  * 이미지 선택 요청 DTO
  *
@@ -22,7 +20,7 @@ import java.util.UUID;
 public class SelectImageRequest {
 
     @NotNull(message = "이미지 ID는 필수입니다.")
-    private UUID imageId;
+    private String imageId;
 
     private String imageUrl;
 }
diff --git a/event-service/src/main/java/com/kt/event/eventservice/application/dto/request/SelectRecommendationRequest.java b/event-service/src/main/java/com/kt/event/eventservice/application/dto/request/SelectRecommendationRequest.java
index 78d2ce9..f586efa 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/application/dto/request/SelectRecommendationRequest.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/application/dto/request/SelectRecommendationRequest.java
@@ -9,7 +9,6 @@ import lombok.Getter;
 import lombok.NoArgsConstructor;
 
 import java.time.LocalDate;
-import java.util.UUID;
 
 /**
  * AI 추천 선택 요청 DTO
@@ -28,8 +27,8 @@ import java.util.UUID;
 public class SelectRecommendationRequest {
 
     @NotNull(message = "추천 ID는 필수입니다.")
-    @Schema(description = "선택한 추천 ID", required = true, example = "550e8400-e29b-41d4-a716-446655440007")
-    private UUID recommendationId;
+    @Schema(description = "선택한 추천 ID", required = true, example = "rec_20250124_001")
+    private String recommendationId;
 
     @Valid
     @Schema(description = "커스터마이징 항목")
diff --git a/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/EventCreatedResponse.java b/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/EventCreatedResponse.java
index 40b0fa3..5ecec28 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/EventCreatedResponse.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/EventCreatedResponse.java
@@ -7,7 +7,6 @@ import lombok.Data;
 import lombok.NoArgsConstructor;
 
 import java.time.LocalDateTime;
-import java.util.UUID;
 
 /**
  * 이벤트 생성 응답 DTO
@@ -22,7 +21,7 @@ import java.util.UUID;
 @Builder
 public class EventCreatedResponse {
 
-    private UUID eventId;
+    private String eventId;
     private EventStatus status;
     private String objective;
     private LocalDateTime createdAt;
diff --git a/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/EventDetailResponse.java b/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/EventDetailResponse.java
index 34461c1..6794524 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/EventDetailResponse.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/EventDetailResponse.java
@@ -10,7 +10,6 @@ import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.UUID;
 
 /**
  * 이벤트 상세 응답 DTO
@@ -25,16 +24,16 @@ import java.util.UUID;
 @Builder
 public class EventDetailResponse {
 
-    private UUID eventId;
-    private UUID userId;
-    private UUID storeId;
+    private String eventId;
+    private String userId;
+    private String storeId;
     private String eventName;
     private String description;
     private String objective;
     private LocalDate startDate;
     private LocalDate endDate;
     private EventStatus status;
-    private UUID selectedImageId;
+    private String selectedImageId;
     private String selectedImageUrl;
     private Integer participants;
     private Integer targetParticipants;
@@ -57,7 +56,7 @@ public class EventDetailResponse {
     @AllArgsConstructor
     @Builder
     public static class GeneratedImageDto {
-        private UUID imageId;
+        private String imageId;
         private String imageUrl;
         private String style;
         private String platform;
@@ -70,7 +69,7 @@ public class EventDetailResponse {
     @AllArgsConstructor
     @Builder
     public static class AiRecommendationDto {
-        private UUID recommendationId;
+        private String recommendationId;
         private String eventName;
         private String description;
         private String promotionType;
diff --git a/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/ImageEditResponse.java b/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/ImageEditResponse.java
index 3879c73..bbd3857 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/ImageEditResponse.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/ImageEditResponse.java
@@ -7,7 +7,6 @@ import lombok.Getter;
 import lombok.NoArgsConstructor;
 
 import java.time.LocalDateTime;
-import java.util.UUID;
 
 /**
  * 이미지 편집 응답 DTO
@@ -25,8 +24,8 @@ import java.util.UUID;
 @Schema(description = "이미지 편집 응답")
 public class ImageEditResponse {
 
-    @Schema(description = "편집된 이미지 ID", example = "550e8400-e29b-41d4-a716-446655440008")
-    private UUID imageId;
+    @Schema(description = "편집된 이미지 ID", example = "img_20250124_001")
+    private String imageId;
 
     @Schema(description = "편집된 이미지 URL", example = "https://cdn.kt-event.com/images/event-img-001-edited.jpg")
     private String imageUrl;
diff --git a/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/ImageGenerationResponse.java b/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/ImageGenerationResponse.java
index 8aea98e..5431b14 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/ImageGenerationResponse.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/ImageGenerationResponse.java
@@ -6,7 +6,6 @@ import lombok.Data;
 import lombok.NoArgsConstructor;
 
 import java.time.LocalDateTime;
-import java.util.UUID;
 
 /**
  * 이미지 생성 응답 DTO
@@ -21,7 +20,7 @@ import java.util.UUID;
 @Builder
 public class ImageGenerationResponse {
 
-    private UUID jobId;
+    private String jobId;
     private String status;
     private String message;
     private LocalDateTime createdAt;
diff --git a/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/JobAcceptedResponse.java b/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/JobAcceptedResponse.java
index bffcad0..f6ae299 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/JobAcceptedResponse.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/JobAcceptedResponse.java
@@ -7,8 +7,6 @@ import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
-import java.util.UUID;
-
 /**
  * Job 접수 응답 DTO
  *
@@ -25,8 +23,8 @@ import java.util.UUID;
 @Schema(description = "Job 접수 응답")
 public class JobAcceptedResponse {
 
-    @Schema(description = "생성된 Job ID", example = "550e8400-e29b-41d4-a716-446655440005")
-    private UUID jobId;
+    @Schema(description = "생성된 Job ID", example = "job_20250124_001")
+    private String jobId;
 
     @Schema(description = "Job 상태 (초기 상태는 PENDING)", example = "PENDING")
     private JobStatus status;
diff --git a/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/JobStatusResponse.java b/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/JobStatusResponse.java
index a1b0899..39f82f8 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/JobStatusResponse.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/application/dto/response/JobStatusResponse.java
@@ -8,7 +8,6 @@ import lombok.Data;
 import lombok.NoArgsConstructor;
 
 import java.time.LocalDateTime;
-import java.util.UUID;
 
 /**
  * Job 상태 응답 DTO
@@ -23,7 +22,7 @@ import java.util.UUID;
 @Builder
 public class JobStatusResponse {
 
-    private UUID jobId;
+    private String jobId;
     private JobType jobType;
     private JobStatus status;
     private int progress;
diff --git a/event-service/src/main/java/com/kt/event/eventservice/application/service/EventService.java b/event-service/src/main/java/com/kt/event/eventservice/application/service/EventService.java
index 79ffd4d..b7b552d 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/application/service/EventService.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/application/service/EventService.java
@@ -24,7 +24,6 @@ import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
-import java.util.UUID;
 import java.util.stream.Collectors;
 
 /**
@@ -52,13 +51,13 @@ public class EventService {
     /**
      * 이벤트 생성 (Step 1: 목적 선택)
      *
-     * @param userId 사용자 ID (UUID)
-     * @param storeId 매장 ID (UUID)
+     * @param userId 사용자 ID
+     * @param storeId 매장 ID
      * @param request 목적 선택 요청
      * @return 생성된 이벤트 응답
      */
     @Transactional
-    public EventCreatedResponse createEvent(UUID userId, UUID storeId, SelectObjectiveRequest request) {
+    public EventCreatedResponse createEvent(String userId, String storeId, SelectObjectiveRequest request) {
         log.info("이벤트 생성 시작 - userId: {}, storeId: {}, objective: {}",
                  userId, storeId, request.getObjective());
 
@@ -87,11 +86,11 @@ public class EventService {
     /**
      * 이벤트 상세 조회
      *
-     * @param userId 사용자 ID (UUID)
+     * @param userId 사용자 ID
      * @param eventId 이벤트 ID
      * @return 이벤트 상세 응답
      */
-    public EventDetailResponse getEvent(UUID userId, UUID eventId) {
+    public EventDetailResponse getEvent(String userId, String eventId) {
         log.info("이벤트 조회 - userId: {}, eventId: {}", userId, eventId);
 
         Event event = eventRepository.findByEventIdAndUserId(eventId, userId)
@@ -108,7 +107,7 @@ public class EventService {
     /**
      * 이벤트 목록 조회 (페이징, 필터링)
      *
-     * @param userId 사용자 ID (UUID)
+     * @param userId 사용자 ID
      * @param status 상태 필터
      * @param search 검색어
      * @param objective 목적 필터
@@ -116,7 +115,7 @@ public class EventService {
      * @return 이벤트 목록
      */
     public Page<EventDetailResponse> getEvents(
-            UUID userId,
+            String userId,
             EventStatus status,
             String search,
             String objective,
@@ -139,11 +138,11 @@ public class EventService {
     /**
      * 이벤트 삭제
      *
-     * @param userId 사용자 ID (UUID)
+     * @param userId 사용자 ID
      * @param eventId 이벤트 ID
      */
     @Transactional
-    public void deleteEvent(UUID userId, UUID eventId) {
+    public void deleteEvent(String userId, String eventId) {
         log.info("이벤트 삭제 - userId: {}, eventId: {}", userId, eventId);
 
         Event event = eventRepository.findByEventIdAndUserId(eventId, userId)
@@ -161,11 +160,11 @@ public class EventService {
     /**
      * 이벤트 배포
      *
-     * @param userId 사용자 ID (UUID)
+     * @param userId 사용자 ID
      * @param eventId 이벤트 ID
      */
     @Transactional
-    public void publishEvent(UUID userId, UUID eventId) {
+    public void publishEvent(String userId, String eventId) {
         log.info("이벤트 배포 - userId: {}, eventId: {}", userId, eventId);
 
         Event event = eventRepository.findByEventIdAndUserId(eventId, userId)
@@ -190,11 +189,11 @@ public class EventService {
     /**
      * 이벤트 종료
      *
-     * @param userId 사용자 ID (UUID)
+     * @param userId 사용자 ID
      * @param eventId 이벤트 ID
      */
     @Transactional
-    public void endEvent(UUID userId, UUID eventId) {
+    public void endEvent(String userId, String eventId) {
         log.info("이벤트 종료 - userId: {}, eventId: {}", userId, eventId);
 
         Event event = eventRepository.findByEventIdAndUserId(eventId, userId)
@@ -210,13 +209,13 @@ public class EventService {
     /**
      * 이미지 생성 요청
      *
-     * @param userId 사용자 ID (UUID)
+     * @param userId 사용자 ID
      * @param eventId 이벤트 ID
      * @param request 이미지 생성 요청
      * @return 이미지 생성 응답 (Job ID 포함)
      */
     @Transactional
-    public ImageGenerationResponse requestImageGeneration(UUID userId, UUID eventId, ImageGenerationRequest request) {
+    public ImageGenerationResponse requestImageGeneration(String userId, String eventId, ImageGenerationRequest request) {
         log.info("이미지 생성 요청 - userId: {}, eventId: {}", userId, eventId);
 
         // 이벤트 조회 및 권한 확인
@@ -245,9 +244,9 @@ public class EventService {
 
         // Kafka 메시지 발행
         imageJobKafkaProducer.publishImageGenerationJob(
-            job.getJobId().toString(),
-            userId.toString(),
-            eventId.toString(),
+            job.getJobId(),
+            userId,
+            eventId,
             prompt
         );
 
@@ -265,13 +264,13 @@ public class EventService {
     /**
      * 이미지 선택
      *
-     * @param userId 사용자 ID (UUID)
+     * @param userId 사용자 ID
      * @param eventId 이벤트 ID
      * @param imageId 이미지 ID
      * @param request 이미지 선택 요청
      */
     @Transactional
-    public void selectImage(UUID userId, UUID eventId, UUID imageId, SelectImageRequest request) {
+    public void selectImage(String userId, String eventId, String imageId, SelectImageRequest request) {
         log.info("이미지 선택 - userId: {}, eventId: {}, imageId: {}", userId, eventId, imageId);
 
         // 이벤트 조회 및 권한 확인
@@ -294,13 +293,13 @@ public class EventService {
     /**
      * AI 추천 요청
      *
-     * @param userId 사용자 ID (UUID)
+     * @param userId 사용자 ID
      * @param eventId 이벤트 ID
      * @param request AI 추천 요청
      * @return Job 접수 응답
      */
     @Transactional
-    public JobAcceptedResponse requestAiRecommendations(UUID userId, UUID eventId, AiRecommendationRequest request) {
+    public JobAcceptedResponse requestAiRecommendations(String userId, String eventId, AiRecommendationRequest request) {
         log.info("AI 추천 요청 - userId: {}, eventId: {}", userId, eventId);
 
         // 이벤트 조회 및 권한 확인
@@ -322,9 +321,9 @@ public class EventService {
 
         // Kafka 메시지 발행
         aiJobKafkaProducer.publishAIGenerationJob(
-            job.getJobId().toString(),
-            userId.toString(),
-            eventId.toString(),
+            job.getJobId(),
+            userId,
+            eventId,
             request.getStoreInfo().getStoreName(),
             request.getStoreInfo().getCategory(),
             request.getStoreInfo().getDescription(),
@@ -343,12 +342,12 @@ public class EventService {
     /**
      * AI 추천 선택
      *
-     * @param userId 사용자 ID (UUID)
+     * @param userId 사용자 ID
      * @param eventId 이벤트 ID
      * @param request AI 추천 선택 요청
      */
     @Transactional
-    public void selectRecommendation(UUID userId, UUID eventId, SelectRecommendationRequest request) {
+    public void selectRecommendation(String userId, String eventId, SelectRecommendationRequest request) {
         log.info("AI 추천 선택 - userId: {}, eventId: {}, recommendationId: {}",
                  userId, eventId, request.getRecommendationId());
 
@@ -409,14 +408,14 @@ public class EventService {
     /**
      * 이미지 편집
      *
-     * @param userId 사용자 ID (UUID)
+     * @param userId 사용자 ID
      * @param eventId 이벤트 ID
      * @param imageId 이미지 ID
      * @param request 이미지 편집 요청
      * @return 이미지 편집 응답
      */
     @Transactional
-    public ImageEditResponse editImage(UUID userId, UUID eventId, UUID imageId, ImageEditRequest request) {
+    public ImageEditResponse editImage(String userId, String eventId, String imageId, ImageEditRequest request) {
         log.info("이미지 편집 - userId: {}, eventId: {}, imageId: {}", userId, eventId, imageId);
 
         // 이벤트 조회 및 권한 확인
@@ -450,12 +449,12 @@ public class EventService {
     /**
      * 배포 채널 선택
      *
-     * @param userId 사용자 ID (UUID)
+     * @param userId 사용자 ID
      * @param eventId 이벤트 ID
      * @param request 배포 채널 선택 요청
      */
     @Transactional
-    public void selectChannels(UUID userId, UUID eventId, SelectChannelsRequest request) {
+    public void selectChannels(String userId, String eventId, SelectChannelsRequest request) {
         log.info("배포 채널 선택 - userId: {}, eventId: {}, channels: {}",
                  userId, eventId, request.getChannels());
 
@@ -479,13 +478,13 @@ public class EventService {
     /**
      * 이벤트 수정
      *
-     * @param userId 사용자 ID (UUID)
+     * @param userId 사용자 ID
      * @param eventId 이벤트 ID
      * @param request 이벤트 수정 요청
      * @return 이벤트 상세 응답
      */
     @Transactional
-    public EventDetailResponse updateEvent(UUID userId, UUID eventId, UpdateEventRequest request) {
+    public EventDetailResponse updateEvent(String userId, String eventId, UpdateEventRequest request) {
         log.info("이벤트 수정 - userId: {}, eventId: {}", userId, eventId);
 
         // 이벤트 조회 및 권한 확인
diff --git a/event-service/src/main/java/com/kt/event/eventservice/application/service/JobService.java b/event-service/src/main/java/com/kt/event/eventservice/application/service/JobService.java
index 9cba649..c98c7fe 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/application/service/JobService.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/application/service/JobService.java
@@ -11,8 +11,6 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
-import java.util.UUID;
-
 /**
  * Job 서비스
  *
@@ -38,7 +36,7 @@ public class JobService {
      * @return 생성된 Job
      */
     @Transactional
-    public Job createJob(UUID eventId, JobType jobType) {
+    public Job createJob(String eventId, JobType jobType) {
         log.info("Job 생성 - eventId: {}, jobType: {}", eventId, jobType);
 
         Job job = Job.builder()
@@ -59,7 +57,7 @@ public class JobService {
      * @param jobId Job ID
      * @return Job 상태 응답
      */
-    public JobStatusResponse getJobStatus(UUID jobId) {
+    public JobStatusResponse getJobStatus(String jobId) {
         log.info("Job 상태 조회 - jobId: {}", jobId);
 
         Job job = jobRepository.findById(jobId)
@@ -75,7 +73,7 @@ public class JobService {
      * @param progress 진행률
      */
     @Transactional
-    public void updateJobProgress(UUID jobId, int progress) {
+    public void updateJobProgress(String jobId, int progress) {
         log.info("Job 진행률 업데이트 - jobId: {}, progress: {}", jobId, progress);
 
         Job job = jobRepository.findById(jobId)
@@ -93,7 +91,7 @@ public class JobService {
      * @param resultKey Redis 결과 키
      */
     @Transactional
-    public void completeJob(UUID jobId, String resultKey) {
+    public void completeJob(String jobId, String resultKey) {
         log.info("Job 완료 - jobId: {}, resultKey: {}", jobId, resultKey);
 
         Job job = jobRepository.findById(jobId)
@@ -113,7 +111,7 @@ public class JobService {
      * @param errorMessage 에러 메시지
      */
     @Transactional
-    public void failJob(UUID jobId, String errorMessage) {
+    public void failJob(String jobId, String errorMessage) {
         log.info("Job 실패 - jobId: {}, errorMessage: {}", jobId, errorMessage);
 
         Job job = jobRepository.findById(jobId)
diff --git a/event-service/src/main/java/com/kt/event/eventservice/application/service/NotificationService.java b/event-service/src/main/java/com/kt/event/eventservice/application/service/NotificationService.java
index 6e32315..b744486 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/application/service/NotificationService.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/application/service/NotificationService.java
@@ -1,7 +1,5 @@
 package com.kt.event.eventservice.application.service;
 
-import java.util.UUID;
-
 /**
  * 알림 서비스 인터페이스
  *
@@ -22,7 +20,7 @@ public interface NotificationService {
      * @param jobType 작업 타입
      * @param message 알림 메시지
      */
-    void notifyJobCompleted(UUID userId, UUID jobId, String jobType, String message);
+    void notifyJobCompleted(String userId, String jobId, String jobType, String message);
 
     /**
      * 작업 실패 알림 전송
@@ -32,7 +30,7 @@ public interface NotificationService {
      * @param jobType 작업 타입
      * @param errorMessage 에러 메시지
      */
-    void notifyJobFailed(UUID userId, UUID jobId, String jobType, String errorMessage);
+    void notifyJobFailed(String userId, String jobId, String jobType, String errorMessage);
 
     /**
      * 작업 진행 상태 알림 전송
@@ -42,5 +40,5 @@ public interface NotificationService {
      * @param jobType 작업 타입
      * @param progress 진행률 (0-100)
      */
-    void notifyJobProgress(UUID userId, UUID jobId, String jobType, int progress);
+    void notifyJobProgress(String userId, String jobId, String jobType, int progress);
 }
diff --git a/event-service/src/main/java/com/kt/event/eventservice/config/DevAuthenticationFilter.java b/event-service/src/main/java/com/kt/event/eventservice/config/DevAuthenticationFilter.java
index fb56ea8..d53ede5 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/config/DevAuthenticationFilter.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/config/DevAuthenticationFilter.java
@@ -11,7 +11,6 @@ import org.springframework.web.filter.OncePerRequestFilter;
 
 import java.io.IOException;
 import java.util.Collections;
-import java.util.UUID;
 
 /**
  * 개발 환경용 인증 필터
@@ -35,11 +34,11 @@ public class DevAuthenticationFilter extends OncePerRequestFilter {
 
         // 개발용 기본 UserPrincipal 생성
         UserPrincipal userPrincipal = new UserPrincipal(
-                UUID.fromString("11111111-1111-1111-1111-111111111111"),  // userId
-                UUID.fromString("22222222-2222-2222-2222-222222222222"),  // storeId
-                "dev@test.com",                                            // email
-                "개발테스트사용자",                                           // name
-                Collections.singletonList("USER")                          // roles
+                "usr_dev_test_001",  // userId
+                "str_dev_test_001",  // storeId
+                "dev@test.com",      // email
+                "개발테스트사용자",      // name
+                Collections.singletonList("USER")  // roles
         );
 
         // Authentication 객체 생성 및 SecurityContext에 설정
diff --git a/event-service/src/main/java/com/kt/event/eventservice/domain/entity/AiRecommendation.java b/event-service/src/main/java/com/kt/event/eventservice/domain/entity/AiRecommendation.java
index 978f9a0..d4b564b 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/domain/entity/AiRecommendation.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/domain/entity/AiRecommendation.java
@@ -3,9 +3,6 @@ package com.kt.event.eventservice.domain.entity;
 import com.kt.event.common.entity.BaseTimeEntity;
 import jakarta.persistence.*;
 import lombok.*;
-import org.hibernate.annotations.GenericGenerator;
-
-import java.util.UUID;
 
 /**
  * AI 추천 엔티티
@@ -26,10 +23,8 @@ import java.util.UUID;
 public class AiRecommendation extends BaseTimeEntity {
 
     @Id
-    @GeneratedValue(generator = "uuid2")
-    @GenericGenerator(name = "uuid2", strategy = "uuid2")
-    @Column(name = "recommendation_id", columnDefinition = "uuid")
-    private UUID recommendationId;
+    @Column(name = "recommendation_id", length = 50)
+    private String recommendationId;
 
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "event_id", nullable = false)
diff --git a/event-service/src/main/java/com/kt/event/eventservice/domain/entity/Event.java b/event-service/src/main/java/com/kt/event/eventservice/domain/entity/Event.java
index 1db4b59..6582c49 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/domain/entity/Event.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/domain/entity/Event.java
@@ -6,7 +6,6 @@ import jakarta.persistence.*;
 import lombok.*;
 import org.hibernate.annotations.Fetch;
 import org.hibernate.annotations.FetchMode;
-import org.hibernate.annotations.GenericGenerator;
 
 import java.time.LocalDate;
 import java.util.*;
@@ -32,16 +31,14 @@ import java.util.*;
 public class Event extends BaseTimeEntity {
 
     @Id
-    @GeneratedValue(generator = "uuid2")
-    @GenericGenerator(name = "uuid2", strategy = "uuid2")
-    @Column(name = "event_id", columnDefinition = "uuid")
-    private UUID eventId;
+    @Column(name = "event_id", length = 50)
+    private String eventId;
 
-    @Column(name = "user_id", nullable = false, columnDefinition = "uuid")
-    private UUID userId;
+    @Column(name = "user_id", nullable = false, length = 50)
+    private String userId;
 
-    @Column(name = "store_id", nullable = false, columnDefinition = "uuid")
-    private UUID storeId;
+    @Column(name = "store_id", nullable = false, length = 50)
+    private String storeId;
 
     @Column(name = "event_name", length = 200)
     private String eventName;
@@ -63,8 +60,8 @@ public class Event extends BaseTimeEntity {
     @Builder.Default
     private EventStatus status = EventStatus.DRAFT;
 
-    @Column(name = "selected_image_id", columnDefinition = "uuid")
-    private UUID selectedImageId;
+    @Column(name = "selected_image_id", length = 50)
+    private String selectedImageId;
 
     @Column(name = "selected_image_url", length = 500)
     private String selectedImageUrl;
@@ -128,7 +125,7 @@ public class Event extends BaseTimeEntity {
     /**
      * 이미지 선택
      */
-    public void selectImage(UUID imageId, String imageUrl) {
+    public void selectImage(String imageId, String imageUrl) {
         this.selectedImageId = imageId;
         this.selectedImageUrl = imageUrl;
 
diff --git a/event-service/src/main/java/com/kt/event/eventservice/domain/entity/GeneratedImage.java b/event-service/src/main/java/com/kt/event/eventservice/domain/entity/GeneratedImage.java
index 1e3db69..5ed613a 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/domain/entity/GeneratedImage.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/domain/entity/GeneratedImage.java
@@ -3,9 +3,6 @@ package com.kt.event.eventservice.domain.entity;
 import com.kt.event.common.entity.BaseTimeEntity;
 import jakarta.persistence.*;
 import lombok.*;
-import org.hibernate.annotations.GenericGenerator;
-
-import java.util.UUID;
 
 /**
  * 생성된 이미지 엔티티
@@ -26,10 +23,8 @@ import java.util.UUID;
 public class GeneratedImage extends BaseTimeEntity {
 
     @Id
-    @GeneratedValue(generator = "uuid2")
-    @GenericGenerator(name = "uuid2", strategy = "uuid2")
-    @Column(name = "image_id", columnDefinition = "uuid")
-    private UUID imageId;
+    @Column(name = "image_id", length = 50)
+    private String imageId;
 
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "event_id", nullable = false)
diff --git a/event-service/src/main/java/com/kt/event/eventservice/domain/entity/Job.java b/event-service/src/main/java/com/kt/event/eventservice/domain/entity/Job.java
index 4ca3f73..6f22eb8 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/domain/entity/Job.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/domain/entity/Job.java
@@ -5,10 +5,8 @@ import com.kt.event.eventservice.domain.enums.JobStatus;
 import com.kt.event.eventservice.domain.enums.JobType;
 import jakarta.persistence.*;
 import lombok.*;
-import org.hibernate.annotations.GenericGenerator;
 
 import java.time.LocalDateTime;
-import java.util.UUID;
 
 /**
  * 비동기 작업 엔티티
@@ -29,13 +27,11 @@ import java.util.UUID;
 public class Job extends BaseTimeEntity {
 
     @Id
-    @GeneratedValue(generator = "uuid2")
-    @GenericGenerator(name = "uuid2", strategy = "uuid2")
-    @Column(name = "job_id", columnDefinition = "uuid")
-    private UUID jobId;
+    @Column(name = "job_id", length = 50)
+    private String jobId;
 
-    @Column(name = "event_id", nullable = false, columnDefinition = "uuid")
-    private UUID eventId;
+    @Column(name = "event_id", nullable = false, length = 50)
+    private String eventId;
 
     @Enumerated(EnumType.STRING)
     @Column(name = "job_type", nullable = false, length = 30)
diff --git a/event-service/src/main/java/com/kt/event/eventservice/domain/repository/AiRecommendationRepository.java b/event-service/src/main/java/com/kt/event/eventservice/domain/repository/AiRecommendationRepository.java
index 7b0b58f..5b938c6 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/domain/repository/AiRecommendationRepository.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/domain/repository/AiRecommendationRepository.java
@@ -5,7 +5,6 @@ import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
 import java.util.List;
-import java.util.UUID;
 
 /**
  * AI 추천 Repository
@@ -15,15 +14,15 @@ import java.util.UUID;
  * @since 2025-10-23
  */
 @Repository
-public interface AiRecommendationRepository extends JpaRepository<AiRecommendation, UUID> {
+public interface AiRecommendationRepository extends JpaRepository<AiRecommendation, String> {
 
     /**
      * 이벤트별 AI 추천 목록 조회
      */
-    List<AiRecommendation> findByEventEventId(UUID eventId);
+    List<AiRecommendation> findByEventEventId(String eventId);
 
     /**
      * 이벤트별 선택된 AI 추천 조회
      */
-    AiRecommendation findByEventEventIdAndIsSelectedTrue(UUID eventId);
+    AiRecommendation findByEventEventIdAndIsSelectedTrue(String eventId);
 }
diff --git a/event-service/src/main/java/com/kt/event/eventservice/domain/repository/EventRepository.java b/event-service/src/main/java/com/kt/event/eventservice/domain/repository/EventRepository.java
index 22add09..22e9873 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/domain/repository/EventRepository.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/domain/repository/EventRepository.java
@@ -10,7 +10,6 @@ import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
 
 import java.util.Optional;
-import java.util.UUID;
 
 /**
  * 이벤트 Repository
@@ -20,7 +19,7 @@ import java.util.UUID;
  * @since 2025-10-23
  */
 @Repository
-public interface EventRepository extends JpaRepository<Event, UUID> {
+public interface EventRepository extends JpaRepository<Event, String> {
 
     /**
      * 사용자 ID와 이벤트 ID로 조회
@@ -29,8 +28,8 @@ public interface EventRepository extends JpaRepository<Event, UUID> {
            "LEFT JOIN FETCH e.channels " +
            "WHERE e.eventId = :eventId AND e.userId = :userId")
     Optional<Event> findByEventIdAndUserId(
-        @Param("eventId") UUID eventId,
-        @Param("userId") UUID userId
+        @Param("eventId") String eventId,
+        @Param("userId") String userId
     );
 
     /**
@@ -42,7 +41,7 @@ public interface EventRepository extends JpaRepository<Event, UUID> {
            "AND (:search IS NULL OR e.eventName LIKE %:search%) " +
            "AND (:objective IS NULL OR e.objective = :objective)")
     Page<Event> findEventsByUser(
-        @Param("userId") UUID userId,
+        @Param("userId") String userId,
         @Param("status") EventStatus status,
         @Param("search") String search,
         @Param("objective") String objective,
@@ -52,5 +51,5 @@ public interface EventRepository extends JpaRepository<Event, UUID> {
     /**
      * 사용자별 이벤트 개수 조회 (상태별)
      */
-    long countByUserIdAndStatus(UUID userId, EventStatus status);
+    long countByUserIdAndStatus(String userId, EventStatus status);
 }
diff --git a/event-service/src/main/java/com/kt/event/eventservice/domain/repository/GeneratedImageRepository.java b/event-service/src/main/java/com/kt/event/eventservice/domain/repository/GeneratedImageRepository.java
index 203c267..94a7dcc 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/domain/repository/GeneratedImageRepository.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/domain/repository/GeneratedImageRepository.java
@@ -5,7 +5,6 @@ import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
 import java.util.List;
-import java.util.UUID;
 
 /**
  * 생성된 이미지 Repository
@@ -15,15 +14,15 @@ import java.util.UUID;
  * @since 2025-10-23
  */
 @Repository
-public interface GeneratedImageRepository extends JpaRepository<GeneratedImage, UUID> {
+public interface GeneratedImageRepository extends JpaRepository<GeneratedImage, String> {
 
     /**
      * 이벤트별 생성된 이미지 목록 조회
      */
-    List<GeneratedImage> findByEventEventId(UUID eventId);
+    List<GeneratedImage> findByEventEventId(String eventId);
 
     /**
      * 이벤트별 선택된 이미지 조회
      */
-    GeneratedImage findByEventEventIdAndIsSelectedTrue(UUID eventId);
+    GeneratedImage findByEventEventIdAndIsSelectedTrue(String eventId);
 }
diff --git a/event-service/src/main/java/com/kt/event/eventservice/domain/repository/JobRepository.java b/event-service/src/main/java/com/kt/event/eventservice/domain/repository/JobRepository.java
index 8673859..6fd7299 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/domain/repository/JobRepository.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/domain/repository/JobRepository.java
@@ -8,7 +8,6 @@ import org.springframework.stereotype.Repository;
 
 import java.util.List;
 import java.util.Optional;
-import java.util.UUID;
 
 /**
  * 비동기 작업 Repository
@@ -18,22 +17,22 @@ import java.util.UUID;
  * @since 2025-10-23
  */
 @Repository
-public interface JobRepository extends JpaRepository<Job, UUID> {
+public interface JobRepository extends JpaRepository<Job, String> {
 
     /**
      * 이벤트별 작업 목록 조회
      */
-    List<Job> findByEventId(UUID eventId);
+    List<Job> findByEventId(String eventId);
 
     /**
      * 이벤트 및 작업 유형별 조회
      */
-    Optional<Job> findByEventIdAndJobType(UUID eventId, JobType jobType);
+    Optional<Job> findByEventIdAndJobType(String eventId, JobType jobType);
 
     /**
      * 이벤트 및 작업 유형별 최신 작업 조회
      */
-    Optional<Job> findFirstByEventIdAndJobTypeOrderByCreatedAtDesc(UUID eventId, JobType jobType);
+    Optional<Job> findFirstByEventIdAndJobTypeOrderByCreatedAtDesc(String eventId, JobType jobType);
 
     /**
      * 상태별 작업 목록 조회
diff --git a/event-service/src/main/java/com/kt/event/eventservice/infrastructure/kafka/AIJobKafkaConsumer.java b/event-service/src/main/java/com/kt/event/eventservice/infrastructure/kafka/AIJobKafkaConsumer.java
index 6d87699..2dcc39c 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/infrastructure/kafka/AIJobKafkaConsumer.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/infrastructure/kafka/AIJobKafkaConsumer.java
@@ -18,8 +18,6 @@ import org.springframework.messaging.handler.annotation.Payload;
 import org.springframework.stereotype.Component;
 import org.springframework.transaction.annotation.Transactional;
 
-import java.util.UUID;
-
 /**
  * AI 이벤트 생성 작업 메시지 구독 Consumer
  *
@@ -93,7 +91,7 @@ public class AIJobKafkaConsumer {
     @Transactional
     protected void processAIEventGenerationJob(AIEventGenerationJobMessage message) {
         try {
-            UUID jobId = UUID.fromString(message.getJobId());
+            String jobId = message.getJobId();
 
             // Job 조회
             Job job = jobRepository.findById(jobId).orElse(null);
@@ -102,7 +100,7 @@ public class AIJobKafkaConsumer {
                 return;
             }
 
-            UUID eventId = job.getEventId();
+            String eventId = job.getEventId();
 
             // Event 조회 (모든 케이스에서 사용)
             Event event = eventRepository.findById(eventId).orElse(null);
@@ -142,7 +140,7 @@ public class AIJobKafkaConsumer {
                             eventId, aiData.getEventTitle());
 
                         // 사용자에게 알림 전송
-                        UUID userId = event.getUserId();
+                        String userId = event.getUserId();
                         notificationService.notifyJobCompleted(
                             userId,
                             jobId,
@@ -166,7 +164,7 @@ public class AIJobKafkaConsumer {
 
                     // 사용자에게 실패 알림 전송
                     if (event != null) {
-                        UUID userId = event.getUserId();
+                        String userId = event.getUserId();
                         notificationService.notifyJobFailed(
                             userId,
                             jobId,
@@ -185,7 +183,7 @@ public class AIJobKafkaConsumer {
 
                     // 사용자에게 진행 상태 알림 전송
                     if (event != null) {
-                        UUID userId = event.getUserId();
+                        String userId = event.getUserId();
                         notificationService.notifyJobProgress(
                             userId,
                             jobId,
diff --git a/event-service/src/main/java/com/kt/event/eventservice/infrastructure/kafka/EventKafkaProducer.java b/event-service/src/main/java/com/kt/event/eventservice/infrastructure/kafka/EventKafkaProducer.java
index 4f21e6c..612f54b 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/infrastructure/kafka/EventKafkaProducer.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/infrastructure/kafka/EventKafkaProducer.java
@@ -29,12 +29,12 @@ public class EventKafkaProducer {
     /**
      * 이벤트 생성 완료 메시지 발행
      *
-     * @param eventId 이벤트 ID (UUID)
-     * @param userId 사용자 ID (UUID)
+     * @param eventId 이벤트 ID
+     * @param userId 사용자 ID
      * @param title 이벤트 제목
      * @param eventType 이벤트 타입
      */
-    public void publishEventCreated(java.util.UUID eventId, java.util.UUID userId, String title, String eventType) {
+    public void publishEventCreated(String eventId, String userId, String title, String eventType) {
         EventCreatedMessage message = EventCreatedMessage.builder()
             .eventId(eventId)
             .userId(userId)
diff --git a/event-service/src/main/java/com/kt/event/eventservice/infrastructure/kafka/ImageJobKafkaConsumer.java b/event-service/src/main/java/com/kt/event/eventservice/infrastructure/kafka/ImageJobKafkaConsumer.java
index 515bac9..96fd607 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/infrastructure/kafka/ImageJobKafkaConsumer.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/infrastructure/kafka/ImageJobKafkaConsumer.java
@@ -18,8 +18,6 @@ import org.springframework.messaging.handler.annotation.Payload;
 import org.springframework.stereotype.Component;
 import org.springframework.transaction.annotation.Transactional;
 
-import java.util.UUID;
-
 /**
  * 이미지 생성 작업 메시지 구독 Consumer
  *
@@ -94,8 +92,8 @@ public class ImageJobKafkaConsumer {
     @Transactional
     protected void processImageGenerationJob(ImageGenerationJobMessage message) {
         try {
-            UUID jobId = UUID.fromString(message.getJobId());
-            UUID eventId = UUID.fromString(message.getEventId());
+            String jobId = message.getJobId();
+            String eventId = message.getEventId();
 
             // Job 조회
             Job job = jobRepository.findById(jobId).orElse(null);
@@ -130,7 +128,7 @@ public class ImageJobKafkaConsumer {
                             eventId, message.getImageUrl());
 
                         // 사용자에게 알림 전송
-                        UUID userId = event.getUserId();
+                        String userId = event.getUserId();
                         notificationService.notifyJobCompleted(
                             userId,
                             jobId,
@@ -181,7 +179,7 @@ public class ImageJobKafkaConsumer {
 
                         // 사용자에게 실패 알림 전송
                         if (event != null) {
-                            UUID userId = event.getUserId();
+                            String userId = event.getUserId();
                             notificationService.notifyJobFailed(
                                 userId,
                                 jobId,
@@ -202,7 +200,7 @@ public class ImageJobKafkaConsumer {
 
                     // 사용자에게 진행 상태 알림 전송
                     if (event != null) {
-                        UUID userId = event.getUserId();
+                        String userId = event.getUserId();
                         notificationService.notifyJobProgress(
                             userId,
                             jobId,
diff --git a/event-service/src/main/java/com/kt/event/eventservice/infrastructure/notification/LoggingNotificationService.java b/event-service/src/main/java/com/kt/event/eventservice/infrastructure/notification/LoggingNotificationService.java
index 49ca3ca..39a94ce 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/infrastructure/notification/LoggingNotificationService.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/infrastructure/notification/LoggingNotificationService.java
@@ -4,8 +4,6 @@ import com.kt.event.eventservice.application.service.NotificationService;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
 
-import java.util.UUID;
-
 /**
  * 로깅 기반 알림 서비스 구현
  *
@@ -20,16 +18,16 @@ import java.util.UUID;
 public class LoggingNotificationService implements NotificationService {
 
     @Override
-    public void notifyJobCompleted(UUID userId, UUID jobId, String jobType, String message) {
+    public void notifyJobCompleted(String userId, String jobId, String jobType, String message) {
         log.info("📢 [작업 완료 알림] UserId: {}, JobId: {}, JobType: {}, Message: {}",
             userId, jobId, jobType, message);
 
         // TODO: WebSocket, SSE, 또는 Push Notification으로 실시간 알림 전송
-        // 예: webSocketTemplate.convertAndSendToUser(userId.toString(), "/queue/notifications", notification);
+        // 예: webSocketTemplate.convertAndSendToUser(userId, "/queue/notifications", notification);
     }
 
     @Override
-    public void notifyJobFailed(UUID userId, UUID jobId, String jobType, String errorMessage) {
+    public void notifyJobFailed(String userId, String jobId, String jobType, String errorMessage) {
         log.error("📢 [작업 실패 알림] UserId: {}, JobId: {}, JobType: {}, Error: {}",
             userId, jobId, jobType, errorMessage);
 
@@ -37,7 +35,7 @@ public class LoggingNotificationService implements NotificationService {
     }
 
     @Override
-    public void notifyJobProgress(UUID userId, UUID jobId, String jobType, int progress) {
+    public void notifyJobProgress(String userId, String jobId, String jobType, int progress) {
         log.info("📢 [작업 진행 알림] UserId: {}, JobId: {}, JobType: {}, Progress: {}%",
             userId, jobId, jobType, progress);
 
diff --git a/event-service/src/main/java/com/kt/event/eventservice/presentation/controller/EventController.java b/event-service/src/main/java/com/kt/event/eventservice/presentation/controller/EventController.java
index 41cbb74..316d48d 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/presentation/controller/EventController.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/presentation/controller/EventController.java
@@ -21,8 +21,6 @@ import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.web.bind.annotation.*;
 
-import java.util.UUID;
-
 /**
  * 이벤트 컨트롤러
  *
@@ -129,7 +127,7 @@ public class EventController {
     @GetMapping("/{eventId}")
     @Operation(summary = "이벤트 상세 조회", description = "특정 이벤트의 상세 정보를 조회합니다.")
     public ResponseEntity<ApiResponse<EventDetailResponse>> getEvent(
-            @PathVariable UUID eventId,
+            @PathVariable String eventId,
             @AuthenticationPrincipal UserPrincipal userPrincipal) {
 
         log.info("이벤트 상세 조회 API 호출 - userId: {}, eventId: {}",
@@ -150,7 +148,7 @@ public class EventController {
     @DeleteMapping("/{eventId}")
     @Operation(summary = "이벤트 삭제", description = "이벤트를 삭제합니다. DRAFT 상태만 삭제 가능합니다.")
     public ResponseEntity<ApiResponse<Void>> deleteEvent(
-            @PathVariable UUID eventId,
+            @PathVariable String eventId,
             @AuthenticationPrincipal UserPrincipal userPrincipal) {
 
         log.info("이벤트 삭제 API 호출 - userId: {}, eventId: {}",
@@ -171,7 +169,7 @@ public class EventController {
     @PostMapping("/{eventId}/publish")
     @Operation(summary = "이벤트 배포", description = "이벤트를 배포합니다. DRAFT → PUBLISHED 상태 변경.")
     public ResponseEntity<ApiResponse<Void>> publishEvent(
-            @PathVariable UUID eventId,
+            @PathVariable String eventId,
             @AuthenticationPrincipal UserPrincipal userPrincipal) {
 
         log.info("이벤트 배포 API 호출 - userId: {}, eventId: {}",
@@ -192,7 +190,7 @@ public class EventController {
     @PostMapping("/{eventId}/end")
     @Operation(summary = "이벤트 종료", description = "이벤트를 종료합니다. PUBLISHED → ENDED 상태 변경.")
     public ResponseEntity<ApiResponse<Void>> endEvent(
-            @PathVariable UUID eventId,
+            @PathVariable String eventId,
             @AuthenticationPrincipal UserPrincipal userPrincipal) {
 
         log.info("이벤트 종료 API 호출 - userId: {}, eventId: {}",
@@ -214,7 +212,7 @@ public class EventController {
     @PostMapping("/{eventId}/images")
     @Operation(summary = "이미지 생성 요청", description = "AI를 통해 이벤트 이미지를 생성합니다.")
     public ResponseEntity<ApiResponse<ImageGenerationResponse>> requestImageGeneration(
-            @PathVariable UUID eventId,
+            @PathVariable String eventId,
             @Valid @RequestBody ImageGenerationRequest request,
             @AuthenticationPrincipal UserPrincipal userPrincipal) {
 
@@ -243,8 +241,8 @@ public class EventController {
     @PutMapping("/{eventId}/images/{imageId}/select")
     @Operation(summary = "이미지 선택", description = "생성된 이미지 중 하나를 선택합니다.")
     public ResponseEntity<ApiResponse<Void>> selectImage(
-            @PathVariable UUID eventId,
-            @PathVariable UUID imageId,
+            @PathVariable String eventId,
+            @PathVariable String imageId,
             @Valid @RequestBody SelectImageRequest request,
             @AuthenticationPrincipal UserPrincipal userPrincipal) {
 
@@ -272,7 +270,7 @@ public class EventController {
     @PostMapping("/{eventId}/ai-recommendations")
     @Operation(summary = "AI 추천 요청", description = "AI 서비스에 이벤트 추천 생성을 요청합니다.")
     public ResponseEntity<ApiResponse<JobAcceptedResponse>> requestAiRecommendations(
-            @PathVariable UUID eventId,
+            @PathVariable String eventId,
             @Valid @RequestBody AiRecommendationRequest request,
             @AuthenticationPrincipal UserPrincipal userPrincipal) {
 
@@ -300,7 +298,7 @@ public class EventController {
     @PutMapping("/{eventId}/recommendations")
     @Operation(summary = "AI 추천 선택", description = "AI가 생성한 추천 중 하나를 선택하고 커스터마이징합니다.")
     public ResponseEntity<ApiResponse<Void>> selectRecommendation(
-            @PathVariable UUID eventId,
+            @PathVariable String eventId,
             @Valid @RequestBody SelectRecommendationRequest request,
             @AuthenticationPrincipal UserPrincipal userPrincipal) {
 
@@ -328,8 +326,8 @@ public class EventController {
     @PutMapping("/{eventId}/images/{imageId}/edit")
     @Operation(summary = "이미지 편집", description = "선택된 이미지를 편집합니다.")
     public ResponseEntity<ApiResponse<ImageEditResponse>> editImage(
-            @PathVariable UUID eventId,
-            @PathVariable UUID imageId,
+            @PathVariable String eventId,
+            @PathVariable String imageId,
             @Valid @RequestBody ImageEditRequest request,
             @AuthenticationPrincipal UserPrincipal userPrincipal) {
 
@@ -357,7 +355,7 @@ public class EventController {
     @PutMapping("/{eventId}/channels")
     @Operation(summary = "배포 채널 선택", description = "이벤트를 배포할 채널을 선택합니다.")
     public ResponseEntity<ApiResponse<Void>> selectChannels(
-            @PathVariable UUID eventId,
+            @PathVariable String eventId,
             @Valid @RequestBody SelectChannelsRequest request,
             @AuthenticationPrincipal UserPrincipal userPrincipal) {
 
@@ -384,7 +382,7 @@ public class EventController {
     @PutMapping("/{eventId}")
     @Operation(summary = "이벤트 수정", description = "기존 이벤트의 정보를 수정합니다. DRAFT 상태만 수정 가능합니다.")
     public ResponseEntity<ApiResponse<EventDetailResponse>> updateEvent(
-            @PathVariable UUID eventId,
+            @PathVariable String eventId,
             @Valid @RequestBody UpdateEventRequest request,
             @AuthenticationPrincipal UserPrincipal userPrincipal) {
 
diff --git a/event-service/src/main/java/com/kt/event/eventservice/presentation/controller/JobController.java b/event-service/src/main/java/com/kt/event/eventservice/presentation/controller/JobController.java
index 149be77..1b2e1a8 100644
--- a/event-service/src/main/java/com/kt/event/eventservice/presentation/controller/JobController.java
+++ b/event-service/src/main/java/com/kt/event/eventservice/presentation/controller/JobController.java
@@ -13,8 +13,6 @@ import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
-import java.util.UUID;
-
 /**
  * Job 컨트롤러
  *
@@ -41,7 +39,7 @@ public class JobController {
      */
     @GetMapping("/{jobId}")
     @Operation(summary = "Job 상태 조회", description = "비동기 작업의 상태를 조회합니다 (폴링 방식).")
-    public ResponseEntity<ApiResponse<JobStatusResponse>> getJobStatus(@PathVariable UUID jobId) {
+    public ResponseEntity<ApiResponse<JobStatusResponse>> getJobStatus(@PathVariable String jobId) {
         log.info("Job 상태 조회 API 호출 - jobId: {}", jobId);
 
         JobStatusResponse response = jobService.getJobStatus(jobId);