diff --git a/database/migrations/2026_01_14_090000_update_role_display_names.php b/database/migrations/2026_01_14_090000_update_role_display_names.php
new file mode 100644
index 0000000..7118498
--- /dev/null
+++ b/database/migrations/2026_01_14_090000_update_role_display_names.php
@@ -0,0 +1,47 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        $roles = [
+            'super-admin' => '系統管理員',
+            'admin' => '一般管理員',
+            'warehouse-manager' => '倉庫管理員',
+            'purchaser' => '採購人員',
+            'viewer' => '檢視人員',
+        ];
+
+        foreach ($roles as $name => $displayName) {
+            DB::table('roles')
+                ->where('name', $name)
+                ->update(['display_name' => $displayName]);
+        }
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+         $roles = [
+            'super-admin',
+            'admin',
+            'warehouse-manager',
+            'purchaser',
+            'viewer',
+        ];
+
+        DB::table('roles')
+            ->whereIn('name', $roles)
+            ->update(['display_name' => null]);
+    }
+};
diff --git a/database/seeders/PermissionSeeder.php b/database/seeders/PermissionSeeder.php
index 2d3b167..8ed4bca 100644
--- a/database/seeders/PermissionSeeder.php
+++ b/database/seeders/PermissionSeeder.php
@@ -67,11 +67,11 @@ class PermissionSeeder extends Seeder
         }
 
         // 建立角色
-        $superAdmin = Role::create(['name' => 'super-admin']);
-        $admin = Role::create(['name' => 'admin']);
-        $warehouseManager = Role::create(['name' => 'warehouse-manager']);
-        $purchaser = Role::create(['name' => 'purchaser']);
-        $viewer = Role::create(['name' => 'viewer']);
+        $superAdmin = Role::create(['name' => 'super-admin', 'display_name' => '系統管理員']);
+        $admin = Role::create(['name' => 'admin', 'display_name' => '一般管理員']);
+        $warehouseManager = Role::create(['name' => 'warehouse-manager', 'display_name' => '倉庫管理員']);
+        $purchaser = Role::create(['name' => 'purchaser', 'display_name' => '採購人員']);
+        $viewer = Role::create(['name' => 'viewer', 'display_name' => '檢視人員']);
 
         // 給角色分配權限
         // super-admin 擁有所有權限