diff --git a/scripts/deploy/install.sh b/scripts/deploy/install.sh
index dcaba3c..5868e29 100644
--- a/scripts/deploy/install.sh
+++ b/scripts/deploy/install.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-# SafeSight Control 一键安装脚本
+# SafeSight Control 一键安装/升级脚本
 # 用法: sudo bash install.sh
 set -e
 
@@ -11,8 +11,16 @@ fi
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 INSTALL_DIR="${1:-/opt/safesightd}"
 ARCH=$(uname -m)
+UPGRADE=false
 
-echo "========== SafeSight Control 安装 =========="
+if [ -f "$INSTALL_DIR/bin/safesightd" ]; then
+    UPGRADE=true
+    echo "========== SafeSight Control 升级 =========="
+    echo "检测到已有安装，将保留数据库和配置文件"
+    systemctl stop safesightd 2>/dev/null || true
+else
+    echo "========== SafeSight Control 安装 =========="
+fi
 echo "安装目录: $INSTALL_DIR"
 
 # 选二进制
@@ -28,24 +36,36 @@ fi
 # 创建目录
 mkdir -p "$INSTALL_DIR"/{bin,config,data}
 
-# 复制文件
+# 复制二进制（始终更新）
 cp "$SCRIPT_DIR/$BIN" "$INSTALL_DIR/bin/safesightd"
 chmod +x "$INSTALL_DIR/bin/safesightd"
 
-[ -f "$SCRIPT_DIR/safesightd.json.example" ] && cp "$SCRIPT_DIR/safesightd.json.example" "$INSTALL_DIR/config/safesightd.json"
-[ -d "$SCRIPT_DIR/configs" ] && cp -r "$SCRIPT_DIR/configs" "$INSTALL_DIR/"
-[ -d "$SCRIPT_DIR/tools" ] && cp -r "$SCRIPT_DIR/tools" "$INSTALL_DIR/"
-[ -d "$SCRIPT_DIR/scripts" ] && cp -r "$SCRIPT_DIR/scripts" "$INSTALL_DIR/"
-[ -d "$SCRIPT_DIR/deps" ] && cp -r "$SCRIPT_DIR/deps" "$INSTALL_DIR/"
+# 配置文件：仅在全新安装时创建，升级保留
+if [ "$UPGRADE" = false ] && [ -f "$SCRIPT_DIR/safesightd.json.example" ]; then
+    cp "$SCRIPT_DIR/safesightd.json.example" "$INSTALL_DIR/config/safesightd.json"
+    echo "  ✓ 配置已创建（请修改 agent_token）"
+else
+    echo "  ✓ 配置文件保留"
+fi
 
-# 安装服务
+# 种子数据、工具、脚本（始终更新）
+[ -d "$SCRIPT_DIR/configs" ] && cp -r "$SCRIPT_DIR/configs"/* "$INSTALL_DIR/configs/" 2>/dev/null && echo "  ✓ 种子数据已更新"
+[ -d "$SCRIPT_DIR/tools" ] && cp -r "$SCRIPT_DIR/tools"/* "$INSTALL_DIR/tools/" 2>/dev/null && echo "  ✓ 构建工具已更新"
+[ -d "$SCRIPT_DIR/scripts" ] && cp -r "$SCRIPT_DIR/scripts"/* "$INSTALL_DIR/scripts/" 2>/dev/null && echo "  ✓ 脚本已更新"
+[ -d "$SCRIPT_DIR/deps" ] && cp -r "$SCRIPT_DIR/deps" "$INSTALL_DIR/" 2>/dev/null && echo "  ✓ 依赖包已更新"
+
+# 安装/更新服务
 cp "$SCRIPT_DIR/safesightd.service" /etc/systemd/system/
 systemctl daemon-reload
-systemctl enable --now safesightd
+
+if [ "$UPGRADE" = true ]; then
+    systemctl start safesightd
+else
+    systemctl enable --now safesightd
+fi
 
 echo ""
-echo "========== 安装完成 =========="
-echo "服务状态:"
-systemctl status safesightd --no-pager -l
+echo "========== 完成 =========="
+systemctl status safesightd --no-pager -l | head -10
 echo ""
 echo "打开 http://$(hostname -I | awk '{print $1}'):18080"