diff --git a/user-management/api/controllers/permissionController.js b/user-management/api/controllers/permissionController.js
index 2849488..40731dc 100644
--- a/user-management/api/controllers/permissionController.js
+++ b/user-management/api/controllers/permissionController.js
@@ -164,6 +164,7 @@ async function getDepartmentPermissions(req, res, next) {
 
 /**
  * POST /api/permissions/departments/:deptId/bulk-set - 부서 권한 일괄 설정
+ * 저장 후 소속 사용자의 중복 개인 레코드 정리
  */
 async function bulkSetDepartmentPermissions(req, res, next) {
   try {
@@ -177,10 +178,34 @@ async function bulkSetDepartmentPermissions(req, res, next) {
       granted_by_id: grantedById
     });
 
+    // 소속 사용자의 중복 개인 레코드 정리
+    const { getPool } = require('../models/userModel');
+    const db = getPool();
+    const [deptUsers] = await db.query(
+      'SELECT user_id FROM sso_users WHERE department_id = ?', [deptId]
+    );
+
+    // 부서가 허용한 페이지 목록
+    const grantedPages = (permissions || [])
+      .filter(p => p.can_access)
+      .map(p => p.page_name);
+
+    let syncedUsers = 0;
+    if (grantedPages.length > 0 && deptUsers.length > 0) {
+      for (const u of deptUsers) {
+        const [delResult] = await db.query(
+          `DELETE FROM user_page_permissions WHERE user_id = ? AND page_name IN (${grantedPages.map(() => '?').join(',')})`,
+          [u.user_id, ...grantedPages]
+        );
+        if (delResult.affectedRows > 0) syncedUsers++;
+      }
+    }
+
     res.json({
       success: true,
-      message: `${result.updated_count}개의 부서 권한이 설정되었습니다`,
-      updated_count: result.updated_count
+      message: `${result.updated_count}개 부서 권한 설정 (${deptUsers.length}명 적용)`,
+      updated_count: result.updated_count,
+      synced_users: deptUsers.length
     });
   } catch (err) {
     next(err);
diff --git a/user-management/api/controllers/userController.js b/user-management/api/controllers/userController.js
index 848744e..2b00b40 100644
--- a/user-management/api/controllers/userController.js
+++ b/user-management/api/controllers/userController.js
@@ -5,6 +5,7 @@
  */
 
 const userModel = require('../models/userModel');
+const permissionModel = require('../models/permissionModel');
 
 /**
  * GET /api/users - 전체 사용자 목록
@@ -62,6 +63,14 @@ async function updateUser(req, res, next) {
       delete data.full_name;
     }
 
+    // 부서 변경 감지 → 개인 권한 초기화
+    if (data.department_id !== undefined) {
+      const existingUser = await userModel.findById(userId);
+      if (existingUser && existingUser.department_id !== data.department_id) {
+        await permissionModel.clearUserPermissionsForDepartmentChange(userId);
+      }
+    }
+
     const user = await userModel.update(userId, data);
     if (!user) {
       return res.status(404).json({ success: false, error: '사용자를 찾을 수 없습니다' });
diff --git a/user-management/api/models/permissionModel.js b/user-management/api/models/permissionModel.js
index 291f7c3..4f22777 100644
--- a/user-management/api/models/permissionModel.js
+++ b/user-management/api/models/permissionModel.js
@@ -105,14 +105,39 @@ async function grantPermission({ user_id, page_name, can_access, granted_by_id,
 }
 
 /**
- * 일괄 권한 부여
+ * 일괄 권한 부여 (부서 허용 페이지는 스킵 + 기존 중복 레코드 정리)
  */
 async function bulkGrant({ user_id, permissions, granted_by_id }) {
   const db = getPool();
   let count = 0;
 
+  // 부서 권한 조회
+  const [userRows] = await db.query(
+    'SELECT department_id FROM sso_users WHERE user_id = ?', [user_id]
+  );
+  const deptId = userRows.length > 0 ? userRows[0].department_id : null;
+
+  const deptGranted = {};
+  if (deptId) {
+    const [deptPerms] = await db.query(
+      'SELECT page_name, can_access FROM department_page_permissions WHERE department_id = ?',
+      [deptId]
+    );
+    deptPerms.forEach(p => { if (p.can_access) deptGranted[p.page_name] = true; });
+  }
+
   for (const perm of permissions) {
     if (!DEFAULT_PAGES[perm.page_name]) continue;
+
+    // 부서가 허용한 페이지는 개인 레코드 삭제 (스킵)
+    if (deptGranted[perm.page_name]) {
+      await db.query(
+        'DELETE FROM user_page_permissions WHERE user_id = ? AND page_name = ?',
+        [user_id, perm.page_name]
+      );
+      continue;
+    }
+
     await db.query(
       `INSERT INTO user_page_permissions (user_id, page_name, can_access, granted_by_id)
        VALUES (?, ?, ?, ?)
@@ -126,12 +151,27 @@ async function bulkGrant({ user_id, permissions, granted_by_id }) {
 }
 
 /**
- * 접근 권한 확인 (우선순위: 개인 > 부서 > 기본값)
+ * 접근 권한 확인 (우선순위: 부서 OR 개인 OR 기본값)
+ * 부서가 허용하면 무조건 허용 (개인이 해제 불가)
  */
 async function checkAccess(userId, pageName) {
   const db = getPool();
 
-  // 1. 명시적 개인 권한
+  // 1. 부서 권한 (마스터) — 부서가 허용하면 무조건 허용
+  const [userRows] = await db.query(
+    'SELECT department_id FROM sso_users WHERE user_id = ?', [userId]
+  );
+  if (userRows.length > 0 && userRows[0].department_id) {
+    const [deptRows] = await db.query(
+      'SELECT can_access FROM department_page_permissions WHERE department_id = ? AND page_name = ?',
+      [userRows[0].department_id, pageName]
+    );
+    if (deptRows.length > 0 && deptRows[0].can_access) {
+      return { can_access: true, reason: 'department_permission' };
+    }
+  }
+
+  // 2. 개인 권한 (추가 부여)
   const [rows] = await db.query(
     'SELECT can_access FROM user_page_permissions WHERE user_id = ? AND page_name = ?',
     [userId, pageName]
@@ -140,26 +180,9 @@ async function checkAccess(userId, pageName) {
     return { can_access: rows[0].can_access, reason: 'explicit_permission' };
   }
 
-  // 2. 부서 권한
-  const [userRows] = await db.query(
-    'SELECT department_id FROM sso_users WHERE user_id = ?',
-    [userId]
-  );
-  if (userRows.length > 0 && userRows[0].department_id) {
-    const [deptRows] = await db.query(
-      'SELECT can_access FROM department_page_permissions WHERE department_id = ? AND page_name = ?',
-      [userRows[0].department_id, pageName]
-    );
-    if (deptRows.length > 0) {
-      return { can_access: deptRows[0].can_access, reason: 'department_permission' };
-    }
-  }
-
   // 3. 기본 권한
   const pageConfig = DEFAULT_PAGES[pageName];
-  if (!pageConfig) {
-    return { can_access: false, reason: 'invalid_page' };
-  }
+  if (!pageConfig) return { can_access: false, reason: 'invalid_page' };
   return { can_access: pageConfig.default_access, reason: 'default_permission' };
 }
 
@@ -252,21 +275,36 @@ async function getUserPermissionsWithSource(userId) {
     deptPerms.forEach(p => { deptPermMap[p.page_name] = !!p.can_access; });
   }
 
-  // 모든 페이지에 대해 결과 조합
+  // 모든 페이지에 대해 결과 조합 (부서 OR 개인 OR 기본)
   const result = {};
   for (const [pageName, config] of Object.entries(DEFAULT_PAGES)) {
-    if (pageName in userPermMap) {
-      result[pageName] = { can_access: userPermMap[pageName], source: 'explicit' };
-    } else if (pageName in deptPermMap) {
-      result[pageName] = { can_access: deptPermMap[pageName], source: 'department' };
+    const deptGranted = deptPermMap[pageName] === true;
+
+    if (deptGranted) {
+      // 부서가 허용 → 무조건 허용, 잠금
+      result[pageName] = { can_access: true, source: 'department', dept_granted: true };
+    } else if (pageName in userPermMap) {
+      result[pageName] = { can_access: userPermMap[pageName], source: 'explicit', dept_granted: false };
     } else {
-      result[pageName] = { can_access: config.default_access, source: 'default' };
+      result[pageName] = { can_access: config.default_access, source: 'default', dept_granted: false };
     }
   }
 
   return { permissions: result, department_id: deptId };
 }
 
+/**
+ * 부서 이동 시 개인 권한 초기화 — user_page_permissions 전체 삭제
+ */
+async function clearUserPermissionsForDepartmentChange(userId) {
+  const db = getPool();
+  const [result] = await db.query(
+    'DELETE FROM user_page_permissions WHERE user_id = ?',
+    [userId]
+  );
+  return { deleted_count: result.affectedRows };
+}
+
 /**
  * 권한 삭제 (기본값으로 되돌림)
  */
@@ -293,5 +331,6 @@ module.exports = {
   setDepartmentPermission,
   bulkSetDepartmentPermissions,
   deleteDepartmentPermission,
-  getUserPermissionsWithSource
+  getUserPermissionsWithSource,
+  clearUserPermissionsForDepartmentChange
 };
diff --git a/user-management/web/index.html b/user-management/web/index.html
index 3fc0023..1374a9b 100644
--- a/user-management/web/index.html
+++ b/user-management/web/index.html
@@ -251,6 +251,9 @@
                         </button>
                         <span id="deptPermSaveStatus" class="text-sm"></span>
                     </div>
+                    <p class="text-xs text-gray-400 mt-1">
+                        <i class="fas fa-info-circle mr-1"></i>부서 권한 저장 시 소속 사용자에게 자동 적용됩니다
+                    </p>
                 </div>
 
                 <div id="deptPermEmpty" class="text-center text-gray-400 py-8 text-sm">
@@ -2001,7 +2004,7 @@
     <!-- JS: Tabs -->
     <script src="/static/js/tkuser-tabs.js?v=2026031401"></script>
     <!-- JS: Individual modules -->
-    <script src="/static/js/tkuser-users.js?v=2026031401"></script>
+    <script src="/static/js/tkuser-users.js?v=2026031601"></script>
     <script src="/static/js/tkuser-projects.js?v=2026031401"></script>
     <script src="/static/js/tkuser-departments.js?v=2026031401"></script>
     <script src="/static/js/tkuser-issue-types.js?v=2026031401"></script>
diff --git a/user-management/web/static/js/tkuser-users.js b/user-management/web/static/js/tkuser-users.js
index 0114e0d..3bbd65b 100644
--- a/user-management/web/static/js/tkuser-users.js
+++ b/user-management/web/static/js/tkuser-users.js
@@ -104,7 +104,7 @@ function loadPermissionsTab() {
 }
 
 /* ===== Users State ===== */
-let users = [], selectedUserId = null, currentPermissions = {}, currentPermSources = {};
+let users = [], selectedUserId = null, currentPermissions = {}, currentPermSources = {}, currentDeptGranted = {};
 
 /* ===== Users CRUD ===== */
 async function loadUsers() {
@@ -219,14 +219,16 @@ document.getElementById('permissionUserSelect').addEventListener('change', async
 async function loadUserPermissions(userId) {
     currentPermissions = {};
     currentPermSources = {};
+    currentDeptGranted = {};
     const allDefs = { ...SYSTEM1_PAGES, ...SYSTEM3_PAGES, ...TKPURCHASE_PAGES, ...TKSAFETY_PAGES, ...TKUSER_PAGES };
-    Object.values(allDefs).flat().forEach(p => { currentPermissions[p.key] = p.def; currentPermSources[p.key] = 'default'; });
+    Object.values(allDefs).flat().forEach(p => { currentPermissions[p.key] = p.def; currentPermSources[p.key] = 'default'; currentDeptGranted[p.key] = false; });
     try {
         const result = await api(`/permissions/users/${userId}/effective-permissions`);
         if (result.permissions) {
             for (const [pageName, info] of Object.entries(result.permissions)) {
                 currentPermissions[pageName] = info.can_access;
                 currentPermSources[pageName] = info.source;
+                currentDeptGranted[pageName] = !!info.dept_granted;
             }
         }
     } catch(e) { console.warn('권한 로드 실패:', e); }
@@ -270,6 +272,17 @@ function renderSystemPerms(containerId, pageDef, color) {
                     ${pages.map(p => {
                         const checked = currentPermissions[p.key] || false;
                         const src = currentPermSources[p.key] || 'default';
+                        const deptLocked = currentDeptGranted[p.key] || false;
+                        if (deptLocked) {
+                            return `
+                            <label class="perm-item flex items-center gap-2.5 p-2.5 border rounded-lg opacity-75 cursor-not-allowed checked" data-group="${groupId}">
+                                <input type="checkbox" id="perm_${p.key}" checked disabled class="h-4 w-4 text-${color}-500 rounded border-gray-300">
+                                <i class="fas fa-lock text-xs text-gray-400"></i>
+                                <i class="fas ${p.icon} text-sm text-${color}-500" data-color="${color}"></i>
+                                <span class="text-sm text-gray-700">${p.title}</span>
+                                <span class="ml-auto text-[10px] px-1.5 py-0.5 rounded bg-emerald-50 text-emerald-500"><i class="fas fa-lock text-[8px] mr-0.5"></i>부서</span>
+                            </label>`;
+                        }
                         return `
                         <label class="perm-item flex items-center gap-2.5 p-2.5 border rounded-lg cursor-pointer ${checked?'checked':'border-gray-200'}" data-group="${groupId}">
                             <input type="checkbox" id="perm_${p.key}" ${checked?'checked':''} class="h-4 w-4 text-${color}-500 rounded border-gray-300 focus:ring-${color}-400"
@@ -308,7 +321,7 @@ function toggleGroup(groupId) {
 }
 
 function toggleGroupAll(groupId, checked) {
-    document.querySelectorAll(`#${groupId} input[type="checkbox"]`).forEach(cb => {
+    document.querySelectorAll(`#${groupId} input[type="checkbox"]:not(:disabled)`).forEach(cb => {
         cb.checked = checked;
         onPermChange(cb);
     });
@@ -317,7 +330,7 @@ function toggleGroupAll(groupId, checked) {
 function toggleSystemAll(prefix, checked) {
     const containerMap = { s1: 's1-perms', s3: 's3-perms', tkpurchase: 'tkpurchase-perms' };
     const containerId = containerMap[prefix] || prefix + '-perms';
-    document.querySelectorAll(`#${containerId} input[type="checkbox"]`).forEach(cb => {
+    document.querySelectorAll(`#${containerId} input[type="checkbox"]:not(:disabled)`).forEach(cb => {
         cb.checked = checked;
         onPermChange(cb);
     });
@@ -334,10 +347,12 @@ document.getElementById('savePermissionsBtn').addEventListener('click', async ()
 
     try {
         const allPages = [...Object.values(SYSTEM1_PAGES).flat(), ...Object.values(SYSTEM3_PAGES).flat(), ...Object.values(TKPURCHASE_PAGES).flat(), ...Object.values(TKSAFETY_PAGES).flat(), ...Object.values(TKUSER_PAGES).flat()];
-        const permissions = allPages.map(p => {
-            const cb = document.getElementById('perm_' + p.key);
-            return { page_name: p.key, can_access: cb ? cb.checked : false };
-        });
+        const permissions = allPages
+            .filter(p => !currentDeptGranted[p.key])
+            .map(p => {
+                const cb = document.getElementById('perm_' + p.key);
+                return { page_name: p.key, can_access: cb ? cb.checked : false };
+            });
         await api('/permissions/bulk-grant', { method:'POST', body: JSON.stringify({ user_id: parseInt(selectedUserId), permissions }) });
         st.textContent = '저장 완료'; st.className = 'text-sm text-emerald-600';
         showToast('권한이 저장되었습니다.');