diff --git a/src/features/posts/queries/useAddPost.tsx b/src/features/posts/queries/useAddPost.tsx
index 0c6ccab8..874389ac 100644
--- a/src/features/posts/queries/useAddPost.tsx
+++ b/src/features/posts/queries/useAddPost.tsx
@@ -13,9 +13,14 @@ export function useAddPost() {
   return useMutation({
     mutationFn: addPost,
     onSuccess: () => {
-      queryClient.refetchQueries({
-        queryKey: ['posts'],
-      });
+      Promise.all([
+        queryClient.invalidateQueries({
+          queryKey: ['posts'],
+        }),
+        queryClient.invalidateQueries({
+          queryKey: ['user'],
+        }),
+      ]);
     },
   });
 }
diff --git a/src/features/user/queries/useUser.tsx b/src/features/user/queries/useUser.tsx
index 2534076b..3e9bb596 100644
--- a/src/features/user/queries/useUser.tsx
+++ b/src/features/user/queries/useUser.tsx
@@ -16,9 +16,9 @@ export function useUser() {
     queryKey: ['user'],
     queryFn: getUser,
     refetchOnWindowFocus: false,
-    refetchOnReconnect: false,
-    initialData: userLocalStorage.getUser(),
-    retry: false,
+    initialData: userLocalStorage.getUser() || undefined,
+    initialDataUpdatedAt: userLocalStorage.getUserUpdatedAt(),
+    staleTime: 1000 * 60 * 5, // 5분
   });
 
   const user: User | null = useMemo(
@@ -53,12 +53,12 @@ export function useUser() {
   );
 
   useEffect(() => {
-    if (!user) {
+    if (!data) {
       userLocalStorage.removeUser();
     } else {
-      userLocalStorage.saveUser(user);
+      userLocalStorage.saveUser(data);
     }
-  }, [user]);
+  }, [data]);
 
   useEffect(() => {
     if (isError) {
diff --git a/src/features/user/utils/user-local-storage.ts b/src/features/user/utils/user-local-storage.ts
index 029ae77a..dc4b3c87 100644
--- a/src/features/user/utils/user-local-storage.ts
+++ b/src/features/user/utils/user-local-storage.ts
@@ -1,15 +1,26 @@
-import { User } from '../types';
+import { GetUserResponse } from '@/features/user/queries/dto/get-user';
 
 const USER_LOCAL_STORAGE_KEY = 'GOCHAM-USER';
+const USER_UPDATED_AT_STORAGE_KEY = 'GOCHAM-USER-UPDATED-AT';
 
 export const userLocalStorage = {
-  saveUser: (user: User) => {
+  saveUser: (user: GetUserResponse) => {
     localStorage.setItem(USER_LOCAL_STORAGE_KEY, JSON.stringify(user));
+    localStorage.setItem(
+      USER_UPDATED_AT_STORAGE_KEY,
+      String(new Date().getTime()),
+    );
   },
-  getUser: (): User | null => {
+  getUser: (): GetUserResponse | null => {
     const user = localStorage.getItem(USER_LOCAL_STORAGE_KEY);
     return user ? JSON.parse(user) : null;
   },
+
+  getUserUpdatedAt: () => {
+    const updatedAt = localStorage.getItem(USER_UPDATED_AT_STORAGE_KEY);
+    return updatedAt ? Number(updatedAt) : null;
+  },
+
   removeUser: () => {
     localStorage.removeItem(USER_LOCAL_STORAGE_KEY);
   },