diff --git a/backend/src/routes/tags.routes.ts b/backend/src/routes/tags.routes.ts
index 60e6aa19..f54f3ccb 100644
--- a/backend/src/routes/tags.routes.ts
+++ b/backend/src/routes/tags.routes.ts
@@ -296,9 +296,15 @@ router
    *                schema:
    *                  type: object
    *                examples:
-   *                  유효하지 않은 content 길이 :
+   *                  유효하지 않은 content 형식 :
    *                    value:
-   *                      errorCode: 910
+   *                      errorCode: 900
+   *                  유효하지 않은 bookInfoId:
+   *                    value:
+   *                      errorCode: 907
+   *                  디폴트 태그의 내용이 중복됨:
+   *                    value:
+   *                      errorCode: 909
    *         '401':
    *            description: 권한 없음.
    *            content:
@@ -356,9 +362,15 @@ router
    *                schema:
    *                  type: object
    *                examples:
-   *                  유효하지 않은 content 길이 :
+   *                  유효하지 않은 content 형식 :
+   *                    value:
+   *                      errorCode: 900
+   *                  유효하지 않은 bookInfoId:
+   *                    value:
+   *                      errorCode: 907
+   *                  슈퍼 태그의 내용이 중복됨:
    *                    value:
-   *                      errorCode: 910
+   *                      errorCode: 908
    *         '401':
    *            description: 권한 없음.
    *            content:
diff --git a/backend/src/tags/tags.controller.ts b/backend/src/tags/tags.controller.ts
index ae8ff24c..6c75c013 100644
--- a/backend/src/tags/tags.controller.ts
+++ b/backend/src/tags/tags.controller.ts
@@ -17,11 +17,15 @@ export const createDefaultTags = async (
   const content = req?.body?.content.trim();
   const tagsService = new TagsService();
   const regex: RegExp = /[^가-힣a-zA-Z0-9_]/g;
+  if (content === '' || content.length > 42 || regex.test(content) === true) {
+    return next(new ErrorResponse(errorCode.INVALID_INPUT_TAGS, 400));
+  }
   if (await tagsService.isValidBookInfoId(parseInt(bookInfoId, 10)) === false) {
     return next(new ErrorResponse(errorCode.INVALID_BOOKINFO_ID, 400));
   }
-  if (content === '' || content.length > 42 || regex.test(content) === true)
-    return next(new ErrorResponse(errorCode.INVALID_INPUT_TAGS, 400));
+  if (await tagsService.isDuplicatedSubDefaultTag(content, bookInfoId)) {
+    return next(new ErrorResponse(errorCode.DUPLICATED_SUB_DEFAULT_TAGS, 400));
+  }
   await tagsService.createDefaultTags(tokenId, bookInfoId, content);
   return res.status(status.CREATED).send();
 };
@@ -36,11 +40,14 @@ export const createSuperTags = async (
   const content = req?.body?.content.trim();
   const tagsService = new TagsService();
   const regex: RegExp = /[^가-힣a-zA-Z0-9_]/g;
+  if (content === '' || content === 'default' || content.length > 42 || regex.test(content) === true) {
+    return next(new ErrorResponse(errorCode.INVALID_INPUT_TAGS, 400));
+  }
   if (await tagsService.isValidBookInfoId(parseInt(bookInfoId, 10)) === false) {
     return next(new ErrorResponse(errorCode.INVALID_BOOKINFO_ID, 400));
   }
-  if (content === '' || content === 'default' || content.length > 42 || regex.test(content) === true) {
-    return next(new ErrorResponse(errorCode.INVALID_INPUT_TAGS, 400));
+  if (await tagsService.isDuplicatedSuperTag(content, bookInfoId)) {
+    return next(new ErrorResponse(errorCode.DUPLICATED_SUPER_TAGS, 400));
   }
   const superTagInsertion = await tagsService.createSuperTags(tokenId, bookInfoId, content);
   
diff --git a/backend/src/tags/tags.service.ts b/backend/src/tags/tags.service.ts
index 73701555..2d1bf86e 100644
--- a/backend/src/tags/tags.service.ts
+++ b/backend/src/tags/tags.service.ts
@@ -267,6 +267,28 @@ export class TagsService {
     }
     return true;
   }
+
+  async isDuplicatedSubDefaultTag(content: string, bookInfoId: number): Promise<boolean> {
+    const subDefaultTag: VTagsSubDefault[] = await this.subTagRepository.getSubTags({
+      content,
+      bookInfoId,
+    });
+    if (subDefaultTag.length === 0) {
+      return false;
+    }
+    return true;
+  }
+
+  async isDuplicatedSuperTag(content: string, bookInfoId: number): Promise<boolean> {
+    const superTag: SuperTag[] = await this.superTagRepository.getSuperTags({
+      content,
+      bookInfoId,
+    });
+    if (superTag.length === 0) {
+      return false;
+    }
+    return true;
+  }
 }
 
 export default TagsService;
diff --git a/backend/src/utils/error/errorCode.ts b/backend/src/utils/error/errorCode.ts
index 6f72555e..018ff66e 100644
--- a/backend/src/utils/error/errorCode.ts
+++ b/backend/src/utils/error/errorCode.ts
@@ -81,6 +81,8 @@ export const CREATE_FAIL_TAGS = '904';
 export const UPDATE_FAIL_TAGS = '905';
 export const DEFAULT_TAG_ID = '906';
 export const INVALID_BOOKINFO_ID = '907';
+export const DUPLICATED_SUPER_TAGS = '908';
+export const DUPLICATED_SUB_DEFAULT_TAGS = '909';
 export const INVALID_TAG_ID = '910';
 
 export const CLIENT_AUTH_FAILED_ERROR_MESSAGE = 'Client authentication failed due to unknown client, no client authentication included, or unsupported authentication method.';