diff --git a/src/api/HTTP.js b/src/api/HTTP.js
new file mode 100644
index 0000000..adb0ae6
--- /dev/null
+++ b/src/api/HTTP.js
@@ -0,0 +1,26 @@
+import iconv from 'iconv-lite';
+import {Buffer} from 'buffer';
+
+function post(url, data) {
+  return new Promise(function (resolve, reject) {
+    const request = new XMLHttpRequest();
+
+    request.onload = () => {
+      if (request.status === 200) {
+        resolve(iconv.decode(Buffer.from(request.response), 'gbk'));
+      } else {
+        reject(new Error(request.statusText));
+      }
+    };
+    request.onerror = () => reject(new Error(request.statusText));
+    request.responseType = 'arraybuffer';
+
+    request.open('POST', url);
+    for (let headerKey in data.headers) {
+      request.setRequestHeader(headerKey, data.headers[headerKey]);
+    }
+    request.send(data.body);
+  });
+}
+
+export {post};
diff --git a/src/component/YooLogin.js b/src/component/YooLogin.js
index 0866599..c6cb104 100644
--- a/src/component/YooLogin.js
+++ b/src/component/YooLogin.js
@@ -1,5 +1,7 @@
 import React, {Component} from 'react';
 import YooLoginUI from '../ui/YooLoginUI';
+import CookieManager from '@react-native-community/cookies';
+import {post} from '../api/HTTP';
 
 export default class YooLogin extends Component {
   constructor(props) {
@@ -21,7 +23,35 @@ export default class YooLogin extends Component {
     this.setState({password: value});
   }
 
-  login(onFail) {}
+  login(onFail) {
+    post('http://eol.ctbu.edu.cn/meol/loginCheck.do', {
+      headers: {
+        'Cache-Control': 'max-age=0',
+        'Upgrade-Insecure-Requests': '1',
+        Origin: 'http://eol.ctbu.edu.cn',
+        'Content-Type': 'application/x-www-form-urlencoded',
+        'User-Agent': 'YooMooc',
+        Referer:
+          'http://eol.ctbu.edu.cn/meol/common/security/login.jsp?enterLid=46445',
+        'Accept-Language': 'zh-CN,zh;q=0.9,en;q=0.8,en-US;q=0.7',
+      },
+      body:
+        'logintoken=' +
+        new Date().getTime() +
+        '&enterLid=46445' +
+        '&IPT_LOGINUSERNAME=' +
+        this.state.username +
+        '&IPT_LOGINPASSWORD=' +
+        this.state.password,
+    }).then((response) => {
+      if (/<title>(.|\n)*用户登录(.|\n)*<\/title>/.test(response)) {
+        onFail();
+        CookieManager.clearAll();
+      } else if (/<title>(.|\n)*网络课程(.|\n)*<\/title>/.test(response)) {
+        // TODO:onSuccess();
+      }
+    });
+  }
 
   render() {
     return (