diff --git a/libs/db.js b/libs/db.js
index 8aea6e7..085dd1b 100644
--- a/libs/db.js
+++ b/libs/db.js
@@ -23,6 +23,9 @@ db.prepare(
 db.prepare(
   `INSERT OR IGNORE INTO configs (name, value) VALUES ('token', 'woshimima')`
 ).run();
+db.prepare(
+  `INSERT OR IGNORE INTO configs (name, value) VALUES ('started', 'false')`
+).run();
 
 // prepare statements
 const insertTimeRange = db.prepare(
@@ -40,6 +43,9 @@ const getUsername = db.prepare(`SELECT username FROM time_ranges WHERE id = ?`);
 const updateUsernameWithLimit = db.transaction((username, id, limit) => {
   const count = countUser.get(username).count;
   const existingUsername = getUsername.get(id).username;
+  if (!getStarted()) {
+    throw new Error("还没到开始时间喔");
+  }
   if (existingUsername !== "") {
     throw new Error("这个时间段已经有人了喔");
   }
@@ -50,9 +56,7 @@ const updateUsernameWithLimit = db.transaction((username, id, limit) => {
 });
 
 const getConfigStmt = db.prepare(`SELECT value FROM configs WHERE name = ?`);
-const setConfigStmt = db.prepare(
-  `UPDATE configs SET value = ? WHERE name = ?`
-);
+const setConfigStmt = db.prepare(`UPDATE configs SET value = ? WHERE name = ?`);
 const getLimit = () => {
   const limit = getConfigStmt.get("limit").value;
   return parseInt(limit);
@@ -70,6 +74,16 @@ const authenticate = (token) => {
   return token === tokenFromDB;
 };
 
+const getStarted = () => {
+  const started = getConfigStmt.get("started").value;
+  return started === "true";
+};
+
+const setStarted = (started) => {
+  const started_string = started ? "true" : "false";
+  setConfigStmt.run(started_string, "started");
+};
+
 export {
   insertTimeRange,
   getTimeRanges,
@@ -79,4 +93,6 @@ export {
   getLimit,
   setLimit,
   authenticate,
+  getStarted,
+  setStarted,
 };
diff --git a/pages/api/time/started.js b/pages/api/time/started.js
new file mode 100644
index 0000000..379f67a
--- /dev/null
+++ b/pages/api/time/started.js
@@ -0,0 +1,27 @@
+import { authenticate, getStarted, setStarted } from "../../../libs/db";
+
+export default function handler(req, res) {
+  // get method
+  if (req.method === "GET") {
+    res.setHeader("Cache-Control", "no-cache no-store must-revalidate");
+    res.status(200).json(getStarted());
+    return;
+  } else if (req.method === "PUT") {
+    // authenticate
+    const { token } = req.body;
+    if (!authenticate(token)) {
+      res.status(401).json({
+        error: `token ${token} 验证失败`,
+      });
+      return;
+    }
+    // set method
+    const { started } = req.body;
+    setStarted(started);
+    res.status(200).json({
+      success: true,
+    });
+  } else {
+    res.status(405).send({ error: "方法" + req.method + "不被允许" });
+  }
+}
diff --git a/pages/time.js b/pages/time.js
index 3defcfc..07f36ae 100644
--- a/pages/time.js
+++ b/pages/time.js
@@ -29,6 +29,25 @@ export default function Time(props) {
 
   const router = useRouter();
 
+  const setStarted = (started) => {
+    fetch("/api/time/started", {
+      method: "PUT",
+      headers: {
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify({ token, started }),
+    })
+      .then((res) => res.json())
+      .then((res) => {
+        if (res.error) {
+          setSnackbarError(true);
+          setSnackbarErrorMessage(res.error);
+        } else {
+          setSnackbarSuccess(true);
+        }
+      });
+  };
+
   const isAdmin = () => {
     if (props.username === "admin") {
       return true;
@@ -226,6 +245,20 @@ export default function Time(props) {
               >
                 修改上限
               </Button>
+              <Button
+                variant="contained"
+                color="primary"
+                onClick={() => setStarted(true)}
+              >
+                开始
+              </Button>
+              <Button
+                variant="contained"
+                color="primary"
+                onClick={() => setStarted(false)}
+              >
+                停止
+              </Button>
             </Box>
           </Box>
         </Box>