diff --git a/src/app/[locale]/layout.tsx b/src/app/[locale]/layout.tsx
index dafb18b3..296187f0 100644
--- a/src/app/[locale]/layout.tsx
+++ b/src/app/[locale]/layout.tsx
@@ -17,12 +17,23 @@ const pretendard = localFont({
   weight: '100 900', // Variable 폰트 weight 범위
 });
 
+// 🏷️ 환경별 접두사
+const getEnvPrefix = () => {
+  const env = process.env.NEXT_PUBLIC_APP_ENV;
+  if (env === 'local') return '[L]';
+  if (env === 'development') return '[D]';
+  return '';
+};
+
+const APP_NAME = 'SAM';
+const APP_TITLE = `${getEnvPrefix()}${APP_NAME} - 내 손안의 대시보드`;
+
 export const metadata: Metadata = {
   title: {
-    default: "ERP System - Enterprise Resource Planning",
-    template: "%s | ERP System"
+    default: APP_TITLE,
+    template: `%s | ${getEnvPrefix()}${APP_NAME} Smart Automation Management`
   },
-  description: "Multi-tenant Enterprise Resource Planning System for SME businesses",
+  description: "내 손안의 대시보드 SAM - 중소기업을 위한 스마트 경영 시스템",
   robots: {
     index: false,
     follow: false,
@@ -42,9 +53,9 @@ export const metadata: Metadata = {
   openGraph: {
     type: 'website',
     locale: 'ko_KR',
-    siteName: 'ERP System',
-    title: 'Enterprise Resource Planning System',
-    description: 'Multi-tenant ERP System for SME businesses',
+    siteName: APP_NAME,
+    title: APP_TITLE,
+    description: '내 손안의 대시보드 SAM - 중소기업을 위한 스마트 경영 시스템',
   },
   // Prevent caching of sensitive pages
   other: {
diff --git a/src/messages/en.json b/src/messages/en.json
index 518c08a7..022e1f85 100644
--- a/src/messages/en.json
+++ b/src/messages/en.json
@@ -1,6 +1,6 @@
 {
   "common": {
-    "appName": "ERP System",
+    "appName": "SAM",
     "welcome": "Welcome",
     "loading": "Loading...",
     "save": "Save",
diff --git a/src/messages/ko.json b/src/messages/ko.json
index 7cbf672a..0da09ed3 100644
--- a/src/messages/ko.json
+++ b/src/messages/ko.json
@@ -1,6 +1,6 @@
 {
   "common": {
-    "appName": "ERP 시스템",
+    "appName": "SAM",
     "welcome": "환영합니다",
     "loading": "로딩 중...",
     "save": "저장",