diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..ba71547
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2022 kw-ic-web
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/app.js b/app.js
new file mode 100644
index 0000000..11a6416
--- /dev/null
+++ b/app.js
@@ -0,0 +1,41 @@
+var createError = require("http-errors");
+var express = require("express");
+var path = require("path");
+var cookieParser = require("cookie-parser");
+var logger = require("morgan");
+
+var indexRouter = require("./routes/index");
+var usersRouter = require("./routes/users");
+
+var app = express();
+
+// view engine setup
+app.set("views", path.join(__dirname, "views"));
+app.set("view engine", "jade");
+
+app.use(logger("dev"));
+app.use(express.json());
+app.use(express.urlencoded({ extended: false }));
+app.use(cookieParser());
+app.use(express.static(path.join(__dirname, "public")));
+
+app.use("/", indexRouter);
+app.use("/users", usersRouter);
+
+// catch 404 and forward to error handler
+app.use(function (req, res, next) {
+  next(createError(404));
+});
+
+// error handler
+app.use(function (err, req, res, next) {
+  // set locals, only providing error in development
+  res.locals.message = err.message;
+  res.locals.error = req.app.get("env") === "development" ? err : {};
+
+  // render the error page
+  res.status(err.status || 500);
+  res.send("something wrong!");
+});
+
+module.exports = app;
diff --git a/bin/www b/bin/www
new file mode 100644
index 0000000..ce54af3
--- /dev/null
+++ b/bin/www
@@ -0,0 +1,88 @@
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require("../app");
+var debug = require("debug")("express-skeleton-html:server");
+var http = require("http");
+const socketHandler = require("../modules/socketHandler");
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+var port = normalizePort(process.env.PORT || "3000");
+app.set("port", port);
+
+/**
+ * Create HTTP server.
+ */
+
+const server = http.createServer(app);
+socketHandler(server);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on("error", onError);
+server.on("listening", onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== "listen") {
+    throw error;
+  }
+
+  var bind = typeof port === "string" ? "Pipe " + port : "Port " + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case "EACCES":
+      console.error(bind + " requires elevated privileges");
+      process.exit(1);
+      break;
+    case "EADDRINUSE":
+      console.error(bind + " is already in use");
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === "string" ? "pipe " + addr : "port " + addr.port;
+  debug("Listening on " + bind);
+}
diff --git a/modules/socketHandler.js b/modules/socketHandler.js
new file mode 100644
index 0000000..98cb10a
--- /dev/null
+++ b/modules/socketHandler.js
@@ -0,0 +1,49 @@
+const { Server } = require("socket.io");
+
+const socketHandler = (server) => {
+  const io = new Server(server, {
+    cors: {
+      origin: "http://localhost:3000",
+      methods: ["GET", "POST"],
+    },
+  });
+
+  let user = {};
+
+  io.on("connection", (socket) => {
+    // 접속 시 서버에서 실행되는 코드
+    const req = socket.request;
+    const socket_id = socket.id;
+    const client_ip =
+      req.headers["x-forwarded-for"] || req.connection.remoteAddress;
+    console.log("connection!");
+    console.log("socket ID : ", socket_id);
+    console.log("client IP : ", client_ip);
+
+    user[socket.id] = { nickname: "users nickname", point: 0 };
+
+    socket.on("disconnect", () => {
+      // 사전 정의 된 callback (disconnect, error)
+      //console.log(socket.id, " client disconnected");
+      delete user[socket.id];
+    });
+
+    socket.on("join_room", (roomName) => {
+      socket.join(roomName);
+      socket.to(roomName).emit("welcome");
+    });
+
+    socket.on("offer", (offer, roomName) => {
+      socket.to(roomName).emit("offer", offer);
+    });
+
+    socket.on("answer", (answer, roomName) => {
+      socket.to(roomName).emit("answer", answer);
+    });
+
+    socket.on("ice", (ice, roomName) => {
+      socket.to(roomName).emit("ice", ice);
+    });
+  });
+};
+module.exports = socketHandler;
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..557cc6d
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,2012 @@
+{
+  "name": "express-skeleton-html",
+  "version": "0.0.0",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "express-skeleton-html",
+      "version": "0.0.0",
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+        "cookie-parser": "~1.4.4",
+        "debug": "~2.6.9",
+        "express": "~4.16.1",
+        "http-errors": "~1.6.3",
+        "jade": "~1.11.0",
+        "morgan": "~1.9.1",
+        "socket.io": "^4.5.3"
+      }
+    },
+    "node_modules/@socket.io/component-emitter": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/@socket.io/component-emitter/-/component-emitter-3.1.0.tgz",
+      "integrity": "sha512-+9jVqKhRSpsc591z5vX+X5Yyw+he/HCB4iQ/RYxw35CEPaY1gnsNE43nf9n9AaYjAQrTiI/mOwKUKdUs9vf7Xg=="
+    },
+    "node_modules/@types/cookie": {
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/@types/cookie/-/cookie-0.4.1.tgz",
+      "integrity": "sha512-XW/Aa8APYr6jSVVA1y/DEIZX0/GMKLEVekNG727R8cs56ahETkRAy/3DR7+fJyh7oUgGwNQaRfXCun0+KbWY7Q=="
+    },
+    "node_modules/@types/cors": {
+      "version": "2.8.12",
+      "resolved": "https://registry.npmjs.org/@types/cors/-/cors-2.8.12.tgz",
+      "integrity": "sha512-vt+kDhq/M2ayberEtJcIN/hxXy1Pk+59g2FV/ZQceeaTyCtCucjL2Q7FXlFjtWn4n15KCr1NE2lNNFhp0lEThw=="
+    },
+    "node_modules/@types/node": {
+      "version": "18.11.9",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.11.9.tgz",
+      "integrity": "sha512-CRpX21/kGdzjOpFsZSkcrXMGIBWMGNIHXXBVFSH+ggkftxg+XYP20TESbh+zFvFj3EQOl5byk0HTRn1IL6hbqg=="
+    },
+    "node_modules/accepts": {
+      "version": "1.3.8",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
+      "integrity": "sha512-PYAthTa2m2VKxuvSD3DPC/Gy+U+sOA1LAuT8mkmRuvw+NACSaeXEQ+NHcVF7rONl6qcaxV3Uuemwawk+7+SJLw==",
+      "dependencies": {
+        "mime-types": "~2.1.34",
+        "negotiator": "0.6.3"
+      },
+      "engines": {
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+      }
+    },
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+      "bin": {
+        "acorn": "bin/acorn"
+      },
+      "engines": {
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+      }
+    },
+    "node_modules/acorn-globals": {
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+      "dependencies": {
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+      }
+    },
+    "node_modules/align-text": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
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+      "dependencies": {
+        "kind-of": "^3.0.2",
+        "longest": "^1.0.1",
+        "repeat-string": "^1.5.2"
+      },
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+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..d2a3909
--- /dev/null
+++ b/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "express_WebRTC",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node ./bin/www"
+  },
+  "dependencies": {
+    "cookie-parser": "~1.4.4",
+    "debug": "~2.6.9",
+    "express": "~4.16.1",
+    "http-errors": "~1.6.3",
+    "jade": "~1.11.0",
+    "morgan": "~1.9.1",
+    "socket.io": "^4.5.3"
+  }
+}
diff --git a/public/javascripts/client.js b/public/javascripts/client.js
new file mode 100644
index 0000000..292d851
--- /dev/null
+++ b/public/javascripts/client.js
@@ -0,0 +1,184 @@
+const socket = io();
+
+const myFace = document.getElementById("myFace");
+const muteBtn = document.getElementById("mute");
+const cameraBtn = document.getElementById("camera");
+const cameraSelect = document.getElementById("cameras");
+const call = document.getElementById("call");
+
+let myStream;
+let muted = false;
+let cameraOff = false;
+let roomName;
+
+const getCameras = async () => {
+  try {
+    const devices = await navigator.mediaDevices.enumerateDevices();
+    //console.log(devices);
+    const cameras = devices.filter((device) => device.kind === "videoinput");
+    // camera 목록을 form input
+    const currentCamera = myStream.getVideoTracks()[0];
+    cameras.forEach((camera) => {
+      const option = document.createElement("option");
+      option.value = camera.deviceId;
+      option.innerText = camera.label;
+      if (currentCamera.label == camera.label) {
+        option.selected = true;
+      }
+      cameraSelect.appendChild(option);
+    });
+  } catch (e) {
+    console.log(e);
+  }
+};
+
+const getMedia = async (deviceId) => {
+  const initialConstraints = {
+    audio: true,
+    video: { facingMode: "user" },
+  };
+
+  const cameraConstraints = {
+    audio: true,
+    video: { deviceId: { exact: deviceId } },
+  };
+
+  try {
+    myStream = await navigator.mediaDevices.getUserMedia(
+      deviceId ? cameraConstraints : initialConstraints
+    );
+    //console.log(myStream);
+    myFace.srcObject = myStream;
+    if (!deviceId) {
+      await getCameras();
+    }
+  } catch (e) {
+    console.log(e);
+  }
+};
+
+const handleMuteClick = () => {
+  console.log(myStream.getAudioTracks());
+  myStream
+    .getAudioTracks()
+    .forEach((track) => (track.enabled = !track.enabled));
+  if (!muted) {
+    muteBtn.innerText = "Unmute";
+    muted = true;
+  } else {
+    muteBtn.innerText = "Mute";
+    muted = false;
+  }
+};
+
+const handleCameraClick = () => {
+  console.log(myStream.getVideoTracks());
+  myStream
+    .getVideoTracks()
+    .forEach((track) => (track.enabled = !track.enabled));
+  if (!cameraOff) {
+    cameraBtn.innerText = "Turn Camera On";
+    cameraOff = true;
+  } else {
+    cameraBtn.innerText = "Turn Camera Off";
+    cameraOff = false;
+  }
+};
+
+const handleCameraChange = async () => {
+  //console.log(cameraSelect.value);
+  await getMedia(cameraSelect.value);
+  if (myPeerConnection) {
+    const videoTrack = myStream.getVideoTracks()[0];
+    const videoSender = myPeerConnection
+      .getSenders()
+      .find((sender) => sender.track.kind === "video");
+    videoSender.replaceTrack(videoTrack);
+  }
+};
+
+// 방 입장하기
+call.hidden = true;
+const startMedia = async () => {
+  welcome.hidden = true;
+  call.hidden = false;
+  await getMedia();
+  makeConnection();
+};
+
+const welcome = document.getElementById("welcome");
+const welcomeForm = welcome.querySelector("form");
+
+const handleWelcomeSubmit = async (event) => {
+  event.preventDefault();
+  const input = welcomeForm.querySelector("input");
+  await startMedia();
+  socket.emit("join_room", input.value);
+  roomName = input.value;
+  input.value = "";
+};
+
+muteBtn.addEventListener("click", handleMuteClick);
+cameraBtn.addEventListener("click", handleCameraClick);
+cameraSelect.addEventListener("input", handleCameraChange);
+welcomeForm.addEventListener("submit", handleWelcomeSubmit);
+
+// socket 구현 부분
+
+socket.on("welcome", async () => {
+  const offer = await myPeerConnection.createOffer();
+  myPeerConnection.setLocalDescription(offer);
+  socket.emit("offer", offer, roomName);
+});
+
+socket.on("offer", async (offer) => {
+  //console.log(offer);
+  myPeerConnection.setRemoteDescription(offer);
+  const answer = await myPeerConnection.createAnswer();
+  //console.log(answer);
+  myPeerConnection.setLocalDescription(answer);
+  socket.emit("answer", answer, roomName);
+});
+
+socket.on("answer", (answer) => {
+  myPeerConnection.setRemoteDescription(answer);
+});
+
+socket.on("ice", (ice) => {
+  myPeerConnection.addIceCandidate(ice);
+});
+
+// RTC 구현 부분
+
+let myPeerConnection;
+
+const makeConnection = () => {
+  myPeerConnection = new RTCPeerConnection({
+    iceServers: [
+      {
+        urls: [
+          "stun:stun.l.google.com:19302",
+          "stun:stun1.l.google.com:19302",
+          "stun:stun2.l.google.com:19302",
+          "stun:stun3.l.google.com:19302",
+          "stun:stun4.l.google.com:19302",
+        ],
+      },
+    ],
+  });
+  myPeerConnection.addEventListener("icecandidate", handleIce);
+  myPeerConnection.addEventListener("addstream", handleAddStream);
+  myStream
+    .getTracks()
+    .forEach((track) => myPeerConnection.addTrack(track, myStream));
+};
+
+const handleIce = (data) => {
+  //console.log(data.candidate);
+  socket.emit("ice", data.candidate, roomName);
+};
+
+const handleAddStream = (data) => {
+  const peerFace = document.getElementById("peerFace");
+  peerFace.srcObject = data.stream;
+};
diff --git a/public/javascripts/index.js b/public/javascripts/index.js
new file mode 100644
index 0000000..3f952ea
--- /dev/null
+++ b/public/javascripts/index.js
@@ -0,0 +1,2 @@
+let a = "hello javascript";
+console.log(a);
diff --git a/public/stylesheets/style.css b/public/stylesheets/style.css
new file mode 100644
index 0000000..9453385
--- /dev/null
+++ b/public/stylesheets/style.css
@@ -0,0 +1,8 @@
+body {
+  padding: 50px;
+  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
+}
+
+a {
+  color: #00B7FF;
+}
diff --git a/routes/index.js b/routes/index.js
new file mode 100644
index 0000000..0ddb322
--- /dev/null
+++ b/routes/index.js
@@ -0,0 +1,18 @@
+const express = require("express");
+const router = express.Router();
+const fs = require("fs");
+
+/* GET home page. */
+router.get("/", function (req, res, next) {
+  fs.readFile("./views/index.html", (err, data) => {
+    if (err) {
+      res.send("error");
+    } else {
+      res.writeHead(200, { "Content-Type": "text/html" });
+      res.write(data);
+      res.end();
+    }
+  });
+});
+
+module.exports = router;
diff --git a/routes/users.js b/routes/users.js
new file mode 100644
index 0000000..623e430
--- /dev/null
+++ b/routes/users.js
@@ -0,0 +1,9 @@
+var express = require('express');
+var router = express.Router();
+
+/* GET users listing. */
+router.get('/', function(req, res, next) {
+  res.send('respond with a resource');
+});
+
+module.exports = router;
diff --git a/views/index.html b/views/index.html
new file mode 100644
index 0000000..19ff784
--- /dev/null
+++ b/views/index.html
@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
+    <title>HTML 5 Boilerplate</title>
+    <link rel="stylesheet" href="/stylesheets/style.css" />
+    <!-- CSS only -->
+    <link
+      href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.2/dist/css/bootstrap.min.css"
+      rel="stylesheet"
+      integrity="sha384-Zenh87qX5JnK2Jl0vWa8Ck2rdkQ2Bzep5IDxbcnCeuOxjzrPF/et3URy9Bv1WTRi"
+      crossorigin="anonymous"
+    />
+  </head>
+  <body>
+    <div class="container-fluid">
+      <div class="row">
+        <div class="col-3"></div>
+        <div class="col-6" id="welcome">
+          <form>
+            <input type="text" placeholder="room name" required />
+            <button>Enter Room</button>
+          </form>
+        </div>
+        <div class="col-3"></div>
+      </div>
+      <div class="row" id="call">
+        <div class="col-3"></div>
+        <div class="col-6" id="myStream">
+          <video
+            id="myFace"
+            autoplay
+            playsinline
+            width="300"
+            height="300"
+          ></video>
+          <button id="mute">Mute</button>
+          <button id="camera">Turn Camera Off</button>
+          <select id="cameras"></select>
+          <video
+            id="peerFace"
+            autoplay
+            playsinline
+            width="300"
+            height="300"
+          ></video>
+        </div>
+        <div class="col-3"></div>
+      </div>
+    </div>
+
+    <script
+      src="https://cdn.socket.io/4.5.3/socket.io.min.js"
+      integrity="sha384-WPFUvHkB1aHA5TDSZi6xtDgkF0wXJcIIxXhC6h8OT8EH3fC5PWro5pWJ1THjcfEi"
+      crossorigin="anonymous"
+    ></script>
+    <script src="/javascripts/index.js"></script>
+    <script src="/javascripts/client.js"></script>
+  </body>
+</html>