diff --git a/src/components/Scanner.tsx b/src/components/Scanner.tsx
index 7c0bc18..4c93a60 100644
--- a/src/components/Scanner.tsx
+++ b/src/components/Scanner.tsx
@@ -1,22 +1,32 @@
 "use client";
 import { useEffect, useState } from "react";
 import { QrReader } from "react-qr-reader";
+
 // Override console.error
 // This is a hack to suppress the warning about missing defaultProps in react-qr-reader
 const error = console.error;
+const manual = "manual";
+
 console.error = (...args: any) => {
   if (/defaultProps/.test(args[0])) return;
   error(...args);
 };
+
 function Scanner({ onResult }: { onResult: (result: string) => void }) {
   useEffect(() => {
     getUserCameraList();
   }, []);
   async function getUserCameraList() {
-    await navigator.mediaDevices.getUserMedia({
-      audio: false,
-      video: true,
-    });
+    try {
+      await navigator.mediaDevices.getUserMedia({
+        audio: false,
+        video: true,
+      });
+    } catch (e) {
+      setCurrentCamera(manual);
+      console.log(e);
+      return;
+    }
 
     let devices = await navigator.mediaDevices.enumerateDevices();
     devices = devices.filter((device) => device.kind == "videoinput");
@@ -35,8 +45,9 @@ function Scanner({ onResult }: { onResult: (result: string) => void }) {
       setCurrentCamera(devices[0].deviceId);
     }
   }
+
   const [cameras, setCameras] = useState<MediaDeviceInfo[]>([]);
-  const [currentCamera, setCurrentCamera] = useState<string | null>(null);
+  const [currentCamera, setCurrentCamera] = useState<string>(manual);
 
   return (
     <div className="relative flex h-full w-full items-center justify-center text-center">
@@ -45,6 +56,7 @@ function Scanner({ onResult }: { onResult: (result: string) => void }) {
         value={currentCamera || ""}
         className="absolute left-0 right-0 top-4 z-[1] m-auto w-[256px] rounded-md bg-white/75 p-2 shadow-md outline-0 backdrop-blur-lg"
       >
+        <option value={manual}>手動輸入</option>
         {cameras.map((camera) => (
           <option key={camera.deviceId} value={camera.deviceId}>
             {camera.label}
@@ -52,37 +64,77 @@ function Scanner({ onResult }: { onResult: (result: string) => void }) {
         ))}
       </select>
 
-      {currentCamera && (
-        <QrReader
-          key={currentCamera}
-          onResult={async (result) => {
-            const text = result?.getText();
-            if (text) {
-              onResult(text);
-            }
-          }}
-          constraints={{
-            deviceId: currentCamera!,
-          }}
-          videoStyle={{
-            objectFit: "cover",
-            height: "100%",
-            width: "100%",
-            position: "relative",
-          }}
-          videoContainerStyle={{
-            height: "100%",
-            width: "100%",
-            padding: "0",
-          }}
-          containerStyle={{
-            height: "100%",
-            width: "100%",
-          }}
-        />
+      {currentCamera === "manual" ? (
+        <Manual onResult={onResult} />
+      ) : (
+        <FromCamera currentCamera={currentCamera} onResult={onResult} />
       )}
     </div>
   );
 }
 
+function Manual({ onResult }: { onResult: (result: string) => void }) {
+  const [value, setValue] = useState("");
+  return (
+    <form
+      onSubmit={(e) => {
+        e.preventDefault();
+        onResult(value);
+      }}
+      className="flex h-full w-full flex-col items-center justify-center gap-4 bg-sitcon-color8"
+    >
+      <input
+        value={value}
+        onChange={(e) => setValue(e.target.value.toUpperCase())}
+        className="rounded-md p-2 px-6 py-4 text-3xl shadow-md outline-0"
+        placeholder="Code"
+      />
+      <button
+        className="rounded-md bg-sitcon-primary p-2 px-10 py-4 text-3xl font-bold text-white shadow-md outline-0"
+        type="submit"
+      >
+        確定
+      </button>
+    </form>
+  );
+}
+
+function FromCamera({
+  currentCamera,
+  onResult,
+}: {
+  currentCamera: string;
+  onResult: (result: string) => void;
+}) {
+  return (
+    <QrReader
+      key={currentCamera}
+      onResult={async (result) => {
+        const text = result?.getText();
+        if (text) {
+          onResult(text);
+        }
+      }}
+      constraints={{
+        deviceId: currentCamera!,
+      }}
+      videoStyle={{
+        objectFit: "cover",
+        height: "100%",
+        width: "100%",
+        position: "relative",
+      }}
+      videoContainerStyle={{
+        height: "100%",
+        width: "100%",
+        padding: "0",
+      }}
+      containerStyle={{
+        height: "100%",
+        width: "100%",
+      }}
+    />
+  );
+}
+
 export default Scanner;