diff --git a/app/Controllers/Admin/Menu.php b/app/Controllers/Admin/Menu.php
index 0e3ca36..73cf7c0 100644
--- a/app/Controllers/Admin/Menu.php
+++ b/app/Controllers/Admin/Menu.php
@@ -32,6 +32,7 @@ class Menu extends BaseController
         $types = $this->typeModel->orderBy('mt_sort', 'ASC')->findAll();
         $requestedMtIdx = (int) ($this->request->getGet('mt_idx') ?? 0);
         $mtIdx = $this->resolveMtIdx($requestedMtIdx, $types);
+        $debugMode = $this->request->getGet('debug') === '1';
         $list = $mtIdx > 0 ? $this->menuModel->getAllByType($mtIdx, $lgIdx) : [];
 
         // 현재 지자체에 메뉴가 없으면, mt_idx별로 기본 지자체(lg_idx=1)의 메뉴를 한 번 복사한다.
@@ -56,6 +57,14 @@ class Menu extends BaseController
                 'mtCode'     => $currentType->mt_code ?? '',
                 'list'       => $list,
                 'levelNames' => config('Roles')->levelNames,
+                'debug_mode' => $debugMode,
+                'debug_info' => [
+                    'lg_idx'           => $lgIdx,
+                    'requested_mt_idx' => $requestedMtIdx,
+                    'resolved_mt_idx'  => $mtIdx,
+                    'resolved_mt_code' => (string) ($currentType->mt_code ?? ''),
+                    'list_count'       => count($list),
+                ],
             ]),
         ]);
     }
diff --git a/app/Views/admin/menu/index.php b/app/Views/admin/menu/index.php
index 2cf8426..253d222 100644
--- a/app/Views/admin/menu/index.php
+++ b/app/Views/admin/menu/index.php
@@ -4,6 +4,8 @@ $list = $list ?? [];
 $mtIdx = (int) ($mtIdx ?? 0);
 $mtCode = (string) ($mtCode ?? '');
 $levelNames = $levelNames ?? [];
+$debugMode = (bool) ($debug_mode ?? false);
+$debugInfo = is_array($debug_info ?? null) ? $debug_info : [];
 helper('admin');
 $adminMenusNavPath = current_nav_request_path();
 
@@ -44,6 +46,17 @@ $adminMenuListResolveHref = static function (string $rawLink) use ($adminMenusNa
   </div>
 </section>
 
+<?php if ($debugMode): ?>
+<section class="mt-2 border border-amber-300 bg-amber-50 text-amber-900 rounded p-2 text-xs">
+  <strong>[DEBUG]</strong>
+  lg_idx=<?= esc((string) ($debugInfo['lg_idx'] ?? '')) ?>,
+  requested_mt_idx=<?= esc((string) ($debugInfo['requested_mt_idx'] ?? '')) ?>,
+  resolved_mt_idx=<?= esc((string) ($debugInfo['resolved_mt_idx'] ?? '')) ?>,
+  resolved_mt_code=<?= esc((string) ($debugInfo['resolved_mt_code'] ?? '')) ?>,
+  list_count=<?= esc((string) ($debugInfo['list_count'] ?? '')) ?>
+</section>
+<?php endif; ?>
+
 <div class="flex gap-4 mt-2 flex-wrap">
   <div class="border border-gray-300 bg-white rounded p-4 flex-1 min-w-0" style="min-width: 320px;">
     <h3 class="text-sm font-bold text-gray-700 mb-2">메뉴 목록</h3>