diff --git a/backend/controllers/account_group.go b/backend/controllers/account_group.go
index e80b099..a5400d0 100644
--- a/backend/controllers/account_group.go
+++ b/backend/controllers/account_group.go
@@ -122,7 +122,10 @@ func SetAccountGroupMembership(ctx *context.Context, w http.ResponseWriter, req
 		return
 	}
 	InvalidateSecurityRuntimeUser(user.ID, user.Account)
-	response.NewSuccessResponse(map[string]any{"user_id": user.ID}).FPrint(w)
+	response.NewSuccessResponse(map[string]any{
+		"user_id":            user.ID,
+		"membership_version": user.SecurityVersion + 1,
+	}).FPrint(w)
 }
 
 func writeAccountGroupError(w http.ResponseWriter, err error) {
diff --git a/frontend/src/views/components/UserManagement/AccountGroups.js b/frontend/src/views/components/UserManagement/AccountGroups.js
index c8c7983..57b6ec5 100644
--- a/frontend/src/views/components/UserManagement/AccountGroups.js
+++ b/frontend/src/views/components/UserManagement/AccountGroups.js
@@ -3,7 +3,7 @@ import { ElMessage, ElMessageBox } from 'element-plus'
 import { http } from '@/utils/axios'
 import { isRecentAuthenticationCancelled, requestWithRecentAuthentication } from '@/utils/recentAuthentication'
 
-export function useAccountGroups(globalStatus) {
+export function useAccountGroups(globalStatus, onMembershipSaved = () => {}) {
   const accountGroups = ref([])
   const groupsLoading = ref(false)
   const groupsError = ref('')
@@ -125,6 +125,13 @@ export function useAccountGroups(globalStatus) {
         group_ids: [...membershipSelection.value]
       }))
       if (response?.errorNo !== 0) throw new Error(response?.errorMsg || '保存成员分组失败')
+      const updatedUser = {
+        ...membershipUser.value,
+        GroupIDs: [...membershipSelection.value],
+        MembershipVersion: response.data.membership_version
+      }
+      membershipUser.value = updatedUser
+      onMembershipSaved(updatedUser)
       membershipVisible.value = false
       ElMessage.success('成员分组已更新，目标账号需重新登录')
       await refreshGroups()
diff --git a/frontend/src/views/components/UserManagement/UserManagement.css b/frontend/src/views/components/UserManagement/UserManagement.css
index f007855..895a2b3 100644
--- a/frontend/src/views/components/UserManagement/UserManagement.css
+++ b/frontend/src/views/components/UserManagement/UserManagement.css
@@ -217,3 +217,32 @@
 .membership-select {
   width: 100%;
 }
+
+.membership-summary {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  flex-wrap: wrap;
+  gap: 12px;
+  width: 100%;
+}
+
+.membership-tags {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+  min-width: 0;
+}
+
+.membership-tags :deep(.el-tag) {
+  height: auto;
+  white-space: normal;
+  overflow-wrap: anywhere;
+}
+
+.membership-hint {
+  margin: 8px 0 0;
+  color: var(--pm-text-secondary);
+  font-size: 12px;
+  line-height: 1.6;
+}
diff --git a/frontend/src/views/components/UserManagement/UserManagement.js b/frontend/src/views/components/UserManagement/UserManagement.js
index 5a78d34..cb22792 100644
--- a/frontend/src/views/components/UserManagement/UserManagement.js
+++ b/frontend/src/views/components/UserManagement/UserManagement.js
@@ -48,7 +48,9 @@ export function canManageRecoveryCode(user) {
 export function usePage() {
   const globalStatus = useGlobalStatusStore()
 
-  const groups = useAccountGroups(globalStatus)
+  const groups = useAccountGroups(globalStatus, user => {
+    if (selectedUser.value?.ID === user.ID) selectedUser.value = user
+  })
   
   const userInfoDialog = ref(false)
   
@@ -56,6 +58,21 @@ export function usePage() {
 
   const selectedUser = ref(null)
 
+  const selectedMembershipGroups = computed(() => {
+    const user = selectedUser.value
+    if (!user) return []
+    return groups.accountGroups.value.filter(group =>
+      groups.canManageGroups.value
+        ? (user.GroupIDs || [0]).includes(group.id)
+        : group.rows.some(member => member.ID === user.ID)
+    )
+  })
+
+  const openMembershipDialog = () => {
+    if (submitting.value || !selectedUser.value) return
+    groups.editMembership(selectedUser.value)
+  }
+
   const recoveryCodeDialogVisible = ref(false)
 
   const externalEmailDialogVisible = ref(false)
@@ -219,6 +236,8 @@ export function usePage() {
     roleChanged,
     submitting,
     selectedUser,
+    selectedMembershipGroups,
+    openMembershipDialog,
     editingCurrentUser,
     recoveryCodeWebManaged,
     recoveryCodeDialogVisible,
diff --git a/frontend/src/views/components/UserManagement/UserManagement.vue b/frontend/src/views/components/UserManagement/UserManagement.vue
index c5e920b..27f646e 100644
--- a/frontend/src/views/components/UserManagement/UserManagement.vue
+++ b/frontend/src/views/components/UserManagement/UserManagement.vue
@@ -119,7 +119,7 @@
       </div>
     </section>
 
-    <el-dialog v-model="membershipVisible" title="设置账号所属分组" width="450px" :close-on-click-modal="!groupSaving" :close-on-press-escape="!groupSaving" :show-close="!groupSaving">
+    <el-dialog v-model="membershipVisible" title="设置账号所属分组" width="450px" :close-on-click-modal="!groupSaving" :close-on-press-escape="!groupSaving" :show-close="!groupSaving" append-to-body>
       <p>账号：{{ membershipUser?.Account }}</p>
       <el-form label-position="top">
         <el-form-item label="所属分组">
@@ -188,6 +188,33 @@
             </span>
           </el-form-item>
 
+          <el-form-item v-if="editModel === 'edit'" label="所属分组">
+            <div class="membership-summary">
+              <div class="membership-tags">
+                <el-tag
+                  v-for="group in selectedMembershipGroups"
+                  :key="group.id"
+                  effect="plain"
+                >
+                  {{ group.name }}
+                </el-tag>
+              </div>
+              <el-button
+                v-if="canManageGroups"
+                :disabled="submitting || groupSaving || groupsLoading || Boolean(groupsError)"
+                @click="openMembershipDialog"
+              >
+                分组管理
+              </el-button>
+            </div>
+            <p v-if="canManageGroups" class="membership-hint">
+              分组单独保存，不会提交本窗口其他修改；选择数量按账号已保存的权限级别校验。
+            </p>
+            <p v-else class="membership-hint">
+              仅显示你有权查看的分组，成员归属由超级管理员维护。
+            </p>
+          </el-form-item>
+
           <div v-if="editModel === 'edit'" class="security-edit-grid">
             <div class="security-edit-item">
               <div>
@@ -301,6 +328,8 @@ const {
   roleChanged,
   submitting,
   selectedUser,
+  selectedMembershipGroups,
+  openMembershipDialog,
   editingCurrentUser,
   recoveryCodeWebManaged,
   recoveryCodeDialogVisible,