diff --git a/.gitea/workflows/deploy.yml b/.gitea/workflows/deploy.yml
index cbb5b55..58f718c 100644
--- a/.gitea/workflows/deploy.yml
+++ b/.gitea/workflows/deploy.yml
@@ -75,12 +75,12 @@ jobs:
             echo "JAR 내부 application-prod.yml 감지 → 외부 파일 제거"
           fi
 
-          # systemd 서비스 파일 배포 (watcher가 반영)
+          # systemd 서비스/타이머 파일 배포 (호스트 타이머가 감지하여 반영)
           cp deploy/kcg-backend.service $DEPLOY_DIR/kcg-backend.service
-          cp deploy/kcg-backend-watcher.service $DEPLOY_DIR/kcg-backend-watcher.service
-          cp deploy/kcg-backend-watcher.path $DEPLOY_DIR/kcg-backend-watcher.path
+          cp deploy/kcg-backend-deploy.service $DEPLOY_DIR/kcg-backend-deploy.service
+          cp deploy/kcg-backend-deploy.timer $DEPLOY_DIR/kcg-backend-deploy.timer
 
-          # JAR 교체 + 재시작 트리거
+          # JAR 교체 (호스트 타이머가 JAR mtime 변경 감지 → 자동 재시작)
           cp backend/target/kcg.jar $DEPLOY_DIR/kcg.jar
-          date '+%s' > $DEPLOY_DIR/.deploy-trigger
           echo "Backend deployed at $(date '+%Y-%m-%d %H:%M:%S')"
+          echo "Host timer will detect JAR update and restart within 30s"
diff --git a/deploy/kcg-backend-deploy.service b/deploy/kcg-backend-deploy.service
new file mode 100644
index 0000000..7308d33
--- /dev/null
+++ b/deploy/kcg-backend-deploy.service
@@ -0,0 +1,23 @@
+[Unit]
+Description=Check and restart KCG Backend if JAR updated
+
+[Service]
+Type=oneshot
+ExecStart=/bin/bash -c '\
+  DEPLOY_DIR=/devdata/services/kcg/backend; \
+  JAR=$DEPLOY_DIR/kcg.jar; \
+  MARKER=$DEPLOY_DIR/.last-restart; \
+  [ ! -f "$JAR" ] && exit 0; \
+  if [ "$JAR" -nt "$MARKER" ] 2>/dev/null || [ ! -f "$MARKER" ]; then \
+    SYSTEMD_DIR=/etc/systemd/system; \
+    CHANGED=0; \
+    for f in kcg-backend.service kcg-backend-deploy.service kcg-backend-deploy.timer; do \
+      if [ -f "$DEPLOY_DIR/$f" ] && ! diff -q "$DEPLOY_DIR/$f" "$SYSTEMD_DIR/$f" >/dev/null 2>&1; then \
+        cp "$DEPLOY_DIR/$f" "$SYSTEMD_DIR/$f"; \
+        CHANGED=1; \
+      fi; \
+    done; \
+    [ "$CHANGED" = "1" ] && systemctl daemon-reload; \
+    systemctl restart kcg-backend; \
+    touch "$MARKER"; \
+  fi'
diff --git a/deploy/kcg-backend-deploy.timer b/deploy/kcg-backend-deploy.timer
new file mode 100644
index 0000000..0bd18fd
--- /dev/null
+++ b/deploy/kcg-backend-deploy.timer
@@ -0,0 +1,9 @@
+[Unit]
+Description=Poll for KCG Backend deploy (JAR update check)
+
+[Timer]
+OnBootSec=60
+OnUnitActiveSec=30
+
+[Install]
+WantedBy=timers.target