diff --git a/frontend/src/network/network.ts b/frontend/src/network/network.ts
index 0bd8695..6696052 100644
--- a/frontend/src/network/network.ts
+++ b/frontend/src/network/network.ts
@@ -730,10 +730,10 @@ class Network {
     );
   }
 
-  async listUserCollections(page: number = 1): Promise<PageResponse<Collection>> {
+  async listUserCollections(username: string, page: number = 1): Promise<PageResponse<Collection>> {
     return this._callApi(() =>
       axios.get(`${this.apiBaseUrl}/collection/list`, {
-        params: { page },
+        params: { username, page },
       }),
     );
   }
@@ -774,11 +774,12 @@ class Network {
   }
 
   async searchUserCollections(
+    username: string,
     keyword: string,
   ): Promise<Response<Collection[]>> {
     return this._callApi(() =>
       axios.get(`${this.apiBaseUrl}/collection/search`, {
-        params: { keyword },
+        params: { username, keyword },
       }),
     );
   }
diff --git a/server/api/collection.go b/server/api/collection.go
index e749f9b..d0ace90 100644
--- a/server/api/collection.go
+++ b/server/api/collection.go
@@ -95,16 +95,16 @@ func handleGetCollection(c fiber.Ctx) error {
 }
 
 func handleListUserCollections(c fiber.Ctx) error {
-	uid, ok := c.Locals("uid").(uint)
-	if !ok {
-		return model.NewUnAuthorizedError("Unauthorized")
-	}
 	pageStr := c.Query("page", "1")
 	page, err := strconv.Atoi(pageStr)
 	if err != nil || page < 1 {
 		page = 1
 	}
-	cols, total, err := service.ListUserCollections(uid, page)
+	username := c.Query("username", "")
+	if username == "" {
+		return model.NewRequestError("Username is required")
+	}
+	cols, total, err := service.ListUserCollections(username, page)
 	if err != nil {
 		return err
 	}
@@ -194,15 +194,15 @@ func handleRemoveResourceFromCollection(c fiber.Ctx) error {
 }
 
 func handleSearchUserCollections(c fiber.Ctx) error {
-	uid, ok := c.Locals("uid").(uint)
-	if !ok {
-		return model.NewUnAuthorizedError("Unauthorized")
-	}
 	keyword := c.Query("keyword", "")
 	if keyword == "" {
 		return model.NewRequestError("keyword is required")
 	}
-	cols, err := service.SearchUserCollections(uid, keyword)
+	username := c.Query("username", "")
+	if username == "" {
+		return model.NewRequestError("username is required")
+	}
+	cols, err := service.SearchUserCollections(username, keyword)
 	if err != nil {
 		return err
 	}
diff --git a/server/service/collection.go b/server/service/collection.go
index 391ce49..e8b7edf 100644
--- a/server/service/collection.go
+++ b/server/service/collection.go
@@ -96,10 +96,15 @@ func GetCollectionByID(id uint) (*model.CollectionView, error) {
 }
 
 // List collections of a user with pagination.
-func ListUserCollections(uid uint, page int) ([]*model.CollectionView, int64, error) {
-	if uid == 0 || page < 1 {
+func ListUserCollections(username string, page int) ([]*model.CollectionView, int64, error) {
+	if username == "" || page < 1 {
 		return nil, 0, errors.New("invalid parameters")
 	}
+	user, err := dao.GetUserByUsername(username)
+	if err != nil {
+		return nil, 0, err
+	}
+	uid := user.ID
 	collections, total, err := dao.ListUserCollections(uid, page, pageSize)
 	if err != nil {
 		return nil, 0, err
@@ -129,10 +134,15 @@ func ListCollectionResources(collectionID uint, page int) ([]*model.ResourceView
 }
 
 // Search user collections by keyword, limited to 10 results.
-func SearchUserCollections(uid uint, keyword string) ([]*model.CollectionView, error) {
-	if uid == 0 || keyword == "" {
+func SearchUserCollections(username string, keyword string) ([]*model.CollectionView, error) {
+	if username == "" || keyword == "" {
 		return nil, errors.New("invalid parameters")
 	}
+	user, err := dao.GetUserByUsername(username)
+	if err != nil {
+		return nil, err
+	}
+	uid := user.ID
 	collections, err := dao.SearchUserCollections(uid, keyword)
 	if err != nil {
 		return nil, err