diff --git a/.playwright-mcp/design/uiux/prototype/screenshots/full-test/01-회원가입.png b/.playwright-mcp/design/uiux/prototype/screenshots/full-test/01-회원가입.png
new file mode 100644
index 0000000..56f7e3c
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diff --git a/.playwright-mcp/design/uiux/prototype/screenshots/full-test/02-매장정보등록.png b/.playwright-mcp/design/uiux/prototype/screenshots/full-test/02-매장정보등록.png
new file mode 100644
index 0000000..1baaaa3
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diff --git a/design/uiux/prototype/02-매장정보등록.html b/design/uiux/prototype/02-매장정보등록.html
index 195dc28..1bce92c 100644
--- a/design/uiux/prototype/02-매장정보등록.html
+++ b/design/uiux/prototype/02-매장정보등록.html
@@ -144,9 +144,10 @@
                   id="businessNumber"
                   name="businessNumber"
                   class="form-input"
-                  placeholder="123-45-67890"
+                  placeholder="숫자만 입력하세요 (예: 1234567890)"
                   required
                   maxlength="12"
+                  inputmode="numeric"
                   style="flex: 1;"
                   autocomplete="off"
                 >
@@ -160,6 +161,9 @@
                   검증하기
                 </button>
               </div>
+              <div class="body-s text-muted" style="margin-top: 4px;">
+                숫자만 입력하시면 자동으로 형식이 맞춰집니다
+              </div>
               <div id="verifyResult" style="margin-top: 8px;"></div>
             </div>
           </section>
diff --git a/design/uiux/prototype/js/common.js b/design/uiux/prototype/js/common.js
index 63a68e8..a3921ef 100644
--- a/design/uiux/prototype/js/common.js
+++ b/design/uiux/prototype/js/common.js
@@ -509,8 +509,8 @@
       }
     }
 
-    // 사업자번호 필드
-    if (input.name === 'business_number' && input.value) {
+    // 사업자번호 필드 (name이 businessNumber인 경우도 처리)
+    if ((input.name === 'business_number' || input.name === 'businessNumber') && input.value) {
       // 자동 하이픈 추가
       let value = input.value.replace(/[^0-9]/g, '');
       if (value.length > 3 && value.length <= 5) {
@@ -520,13 +520,16 @@
       }
       input.value = value;
 
-      // 검증
+      // 검증 (완전한 형식일 때만)
       if (value.length === 12) {
         if (!window.FormValidator.isValidBusinessNumber(value)) {
           window.FormValidator.showError(input, '올바른 사업자번호 형식을 입력하세요.');
         } else {
           window.FormValidator.clearError(input);
         }
+      } else {
+        // 입력 중일 때는 에러 제거
+        window.FormValidator.clearError(input);
       }
     }
   });