diff --git a/README.md b/README.md
index 3a198d6..503ffaf 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,11 @@ PlexPlaylistSync 是一个用于同步 Plex 播放列表和本地 `.m3u`/`.m3u8`
 - **低功耗运行**: 适合 NAS 或服务器 24 小时运行，优化资源使用，减少能耗。
 - **Docker 部署**: 可通过 Docker 轻松部署和运行。
 
+### Token 登录
+
+首次登录时使用用户名和密码连接 Plex 服务器，成功后程序会将获得的 `token` 保存在配置文件中，后续通信仅使用该 `token`，不再保存明文密码。
+默认情况下 Plex 服务器使用 `32400` 端口，可在未修改服务器端口时直接使用该默认值。
+
 ## 安装
 
 首先安装依赖：
diff --git a/app/config.json b/app/config.json
index 8047ddd..b8f325e 100644
--- a/app/config.json
+++ b/app/config.json
@@ -1,3 +1,6 @@
 {
-    "theme": "light"
+    "theme": "auto",
+    "token": "",
+    "server_url": "",
+    "server_port": "32400"
 }
\ No newline at end of file
diff --git a/app/main.py b/app/main.py
index 61f5edf..0b5dce7 100644
--- a/app/main.py
+++ b/app/main.py
@@ -4,6 +4,7 @@ from fastapi import FastAPI, Request, Form
 from fastapi.responses import HTMLResponse, RedirectResponse
 from fastapi.templating import Jinja2Templates
 from fastapi.staticfiles import StaticFiles
+from app.utils.plex_client import connect_plex
 
 app = FastAPI()
 templates = Jinja2Templates(directory=os.path.join(os.path.dirname(__file__), "templates"))
@@ -31,16 +32,34 @@ async def login(
     user: str = Form(...),
     pw: str = Form(...),
     url: str = Form(...),
-    port: str = Form(...),
-    library: str = Form(...)
+    port: str = Form("32400")
 ):
     config = load_config()
     theme = config.get("theme", "auto")
-    # demo：假装连接成功
-    if user == "admin":
-        return templates.TemplateResponse("login.html", {"request": request, "message": "连接成功", "success": True, "theme": theme, "path": "/login"})
-    else:
-        return templates.TemplateResponse("login.html", {"request": request, "message": "连接失败：用户名错误", "success": False, "theme": theme, "path": "/login"})
+    try:
+        connect_plex(config, user, pw, url, port)
+        save_config(config)
+        return templates.TemplateResponse(
+            "login.html",
+            {
+                "request": request,
+                "message": "连接成功",
+                "success": True,
+                "theme": theme,
+                "path": "/login",
+            },
+        )
+    except Exception as e:
+        return templates.TemplateResponse(
+            "login.html",
+            {
+                "request": request,
+                "message": f"连接失败：{str(e)}",
+                "success": False,
+                "theme": theme,
+                "path": "/login",
+            },
+        )
 
 @app.get("/playlist", response_class=HTMLResponse)
 async def get_playlist(request: Request):
diff --git a/app/templates/login.html b/app/templates/login.html
index 171d23a..7c80bd9 100644
--- a/app/templates/login.html
+++ b/app/templates/login.html
@@ -19,14 +19,7 @@
     </div>
     <div class="mb-3">
         <label for="port" class="form-label">端口</label>
-        <input type="text" class="form-control" id="port" name="port" placeholder="32400">
-    </div>
-    <div class="mb-3">
-        <label for="library" class="form-label">选择库</label>
-        <select class="form-select" id="library" name="library">
-            <option>Music</option>
-            <option>Podcast</option>
-        </select>
+        <input type="text" class="form-control" id="port" name="port" value="32400">
     </div>
     <button type="submit" class="btn btn-primary">连接</button>
 </form>
diff --git a/app/utils/plex_client.py b/app/utils/plex_client.py
new file mode 100644
index 0000000..d67659a
--- /dev/null
+++ b/app/utils/plex_client.py
@@ -0,0 +1,16 @@
+from plexapi.myplex import MyPlexAccount
+from plexapi.server import PlexServer
+
+
+def connect_plex(config, username, password, url, port="32400"):
+    """Return a connected PlexServer instance and update config with token and server info."""
+    token = config.get("token")
+    if not token:
+        account = MyPlexAccount(username, password)
+        token = account.authenticationToken
+        config["token"] = token
+
+    base_url = f"http://{url}:{port}"
+    server = PlexServer(base_url, token)
+    config.update({"server_url": url, "server_port": port})
+    return server
diff --git a/requirements.txt b/requirements.txt
index 24a1b62..8222198 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,4 @@ fastapi
 uvicorn[standard]
 jinja2
 python-multipart
+plexapi