diff --git a/src/app/hooks/useSelectedSpace.js b/src/app/hooks/useSelectedSpace.js
new file mode 100644
index 0000000..535c5dc
--- /dev/null
+++ b/src/app/hooks/useSelectedSpace.js
@@ -0,0 +1,21 @@
+/* eslint-disable import/prefer-default-export */
+import { useState, useEffect } from 'react';
+
+import cons from '../../client/state/cons';
+import navigation from '../../client/state/navigation';
+
+export function useSelectedSpace() {
+  const [spaceId, setSpaceId] = useState(navigation.selectedSpaceId);
+
+  useEffect(() => {
+    const onSpaceSelected = (roomId) => {
+      setSpaceId(roomId);
+    };
+    navigation.on(cons.events.navigation.SPACE_SELECTED, onSpaceSelected);
+    return () => {
+      navigation.removeListener(cons.events.navigation.SPACE_SELECTED, onSpaceSelected);
+    };
+  }, []);
+
+  return [spaceId];
+}
diff --git a/src/app/hooks/useSelectedTab.js b/src/app/hooks/useSelectedTab.js
new file mode 100644
index 0000000..33b76a8
--- /dev/null
+++ b/src/app/hooks/useSelectedTab.js
@@ -0,0 +1,21 @@
+/* eslint-disable import/prefer-default-export */
+import { useState, useEffect } from 'react';
+
+import cons from '../../client/state/cons';
+import navigation from '../../client/state/navigation';
+
+export function useSelectedTab() {
+  const [selectedTab, setSelectedTab] = useState(navigation.selectedTab);
+
+  useEffect(() => {
+    const onTabSelected = (tabId) => {
+      setSelectedTab(tabId);
+    };
+    navigation.on(cons.events.navigation.TAB_SELECTED, onTabSelected);
+    return () => {
+      navigation.removeListener(cons.events.navigation.TAB_SELECTED, onTabSelected);
+    };
+  }, []);
+
+  return [selectedTab];
+}
diff --git a/src/app/hooks/useSpaceShortcut.js b/src/app/hooks/useSpaceShortcut.js
new file mode 100644
index 0000000..8dca2ba
--- /dev/null
+++ b/src/app/hooks/useSpaceShortcut.js
@@ -0,0 +1,22 @@
+/* eslint-disable import/prefer-default-export */
+import { useState, useEffect } from 'react';
+
+import initMatrix from '../../client/initMatrix';
+import cons from '../../client/state/cons';
+
+export function useSpaceShortcut() {
+  const { roomList } = initMatrix;
+  const [spaceShortcut, setSpaceShortcut] = useState([...roomList.spaceShortcut]);
+
+  useEffect(() => {
+    const onSpaceShortcutUpdated = () => {
+      setSpaceShortcut([...roomList.spaceShortcut]);
+    };
+    roomList.on(cons.events.roomList.SPACE_SHORTCUT_UPDATED, onSpaceShortcutUpdated);
+    return () => {
+      roomList.removeListener(cons.events.roomList.SPACE_SHORTCUT_UPDATED, onSpaceShortcutUpdated);
+    };
+  }, []);
+
+  return [spaceShortcut];
+}
diff --git a/src/app/organisms/navigation/Drawer.jsx b/src/app/organisms/navigation/Drawer.jsx
index f31c6b5..e5b9a25 100644
--- a/src/app/organisms/navigation/Drawer.jsx
+++ b/src/app/organisms/navigation/Drawer.jsx
@@ -14,34 +14,12 @@ import DrawerBreadcrumb from './DrawerBreadcrumb';
 import Home from './Home';
 import Directs from './Directs';
 
-function Drawer() {
-  const [systemState, setSystemState] = useState(null);
-  const [selectedTab, setSelectedTab] = useState(navigation.selectedTab);
-  const [spaceId, setSpaceId] = useState(navigation.selectedSpaceId);
-  const scrollRef = useRef(null);
+import { useSelectedTab } from '../../hooks/useSelectedTab';
+import { useSelectedSpace } from '../../hooks/useSelectedSpace';
+
+function useSystemState() {
+  const [systemState, setSystemState] = useState(null);
 
-  useEffect(() => {
-    const onTabSelected = (tabId) => {
-      setSelectedTab(tabId);
-    };
-    const onSpaceSelected = (roomId) => {
-      setSpaceId(roomId);
-    };
-    const onRoomLeaved = (roomId) => {
-      const lRoomIndex = navigation.selectedSpacePath.indexOf(roomId);
-      if (lRoomIndex === -1) return;
-      if (lRoomIndex === 0) selectTab(cons.tabs.HOME);
-      else selectSpace(navigation.selectedSpacePath[lRoomIndex - 1]);
-    };
-    navigation.on(cons.events.navigation.TAB_SELECTED, onTabSelected);
-    navigation.on(cons.events.navigation.SPACE_SELECTED, onSpaceSelected);
-    initMatrix.roomList.on(cons.events.roomList.ROOM_LEAVED, onRoomLeaved);
-    return () => {
-      navigation.removeListener(cons.events.navigation.TAB_SELECTED, onTabSelected);
-      navigation.removeListener(cons.events.navigation.SPACE_SELECTED, onSpaceSelected);
-      initMatrix.roomList.removeListener(cons.events.roomList.ROOM_LEAVED, onRoomLeaved);
-    };
-  }, []);
   useEffect(() => {
     const handleSystemState = (state) => {
       if (state === 'ERROR' || state === 'RECONNECTING' || state === 'STOPPED') {
@@ -55,6 +33,15 @@ function Drawer() {
     };
   }, [systemState]);
 
+  return [systemState];
+}
+
+function Drawer() {
+  const [systemState] = useSystemState();
+  const [selectedTab] = useSelectedTab();
+  const [spaceId] = useSelectedSpace();
+  const scrollRef = useRef(null);
+
   useEffect(() => {
     requestAnimationFrame(() => {
       scrollRef.current.scrollTop = 0;
diff --git a/src/app/organisms/navigation/SideBar.jsx b/src/app/organisms/navigation/SideBar.jsx
index 8d587e6..8e630d7 100644
--- a/src/app/organisms/navigation/SideBar.jsx
+++ b/src/app/organisms/navigation/SideBar.jsx
@@ -7,7 +7,6 @@ import colorMXID from '../../../util/colorMXID';
 import {
   selectTab, openInviteList, openSearch, openSettings,
 } from '../../../client/action/navigation';
-import navigation from '../../../client/state/navigation';
 import { abbreviateNumber } from '../../../util/common';
 
 import ScrollView from '../../atoms/scroll/ScrollView';
@@ -18,6 +17,9 @@ import UserIC from '../../../../public/res/ic/outlined/user.svg';
 import SearchIC from '../../../../public/res/ic/outlined/search.svg';
 import InviteIC from '../../../../public/res/ic/outlined/invite.svg';
 
+import { useSelectedTab } from '../../hooks/useSelectedTab';
+import { useSpaceShortcut } from '../../hooks/useSpaceShortcut';
+
 function ProfileAvatarMenu() {
   const mx = initMatrix.matrixClient;
   const [profile, setProfile] = useState({
@@ -54,41 +56,42 @@ function ProfileAvatarMenu() {
   );
 }
 
-function SideBar() {
-  const { roomList, notifications } = initMatrix;
-  const mx = initMatrix.matrixClient;
+function useTotalInvites() {
+  const { roomList } = initMatrix;
   const totalInviteCount = () => roomList.inviteRooms.size
     + roomList.inviteSpaces.size
     + roomList.inviteDirects.size;
-
   const [totalInvites, updateTotalInvites] = useState(totalInviteCount());
-  const [selectedTab, setSelectedTab] = useState(navigation.selectedTab);
-  const [, forceUpdate] = useState({});
-
-  function onTabSelected(tabId) {
-    setSelectedTab(tabId);
-  }
-  function onInviteListChange() {
-    updateTotalInvites(totalInviteCount());
-  }
-  function onSpaceShortcutUpdated() {
-    forceUpdate({});
-  }
-  function onNotificationChanged(roomId, total, prevTotal) {
-    if (total === prevTotal) return;
-    forceUpdate({});
-  }
 
   useEffect(() => {
-    navigation.on(cons.events.navigation.TAB_SELECTED, onTabSelected);
-    roomList.on(cons.events.roomList.SPACE_SHORTCUT_UPDATED, onSpaceShortcutUpdated);
+    const onInviteListChange = () => {
+      updateTotalInvites(totalInviteCount());
+    };
     roomList.on(cons.events.roomList.INVITELIST_UPDATED, onInviteListChange);
-    notifications.on(cons.events.notifications.NOTI_CHANGED, onNotificationChanged);
-
     return () => {
-      navigation.removeListener(cons.events.navigation.TAB_SELECTED, onTabSelected);
-      roomList.removeListener(cons.events.roomList.SPACE_SHORTCUT_UPDATED, onSpaceShortcutUpdated);
       roomList.removeListener(cons.events.roomList.INVITELIST_UPDATED, onInviteListChange);
+    };
+  }, []);
+
+  return [totalInvites];
+}
+
+function SideBar() {
+  const { roomList, notifications } = initMatrix;
+  const mx = initMatrix.matrixClient;
+
+  const [selectedTab] = useSelectedTab();
+  const [spaceShortcut] = useSpaceShortcut();
+  const [totalInvites] = useTotalInvites();
+  const [, forceUpdate] = useState({});
+
+  useEffect(() => {
+    function onNotificationChanged(roomId, total, prevTotal) {
+      if (total === prevTotal) return;
+      forceUpdate({});
+    }
+    notifications.on(cons.events.notifications.NOTI_CHANGED, onNotificationChanged);
+    return () => {
       notifications.removeListener(cons.events.notifications.NOTI_CHANGED, onNotificationChanged);
     };
   }, []);
@@ -156,7 +159,7 @@ function SideBar() {
             <div className="sidebar-divider" />
             <div className="space-container">
               {
-                [...roomList.spaceShortcut].map((shortcut) => {
+                spaceShortcut.map((shortcut) => {
                   const sRoomId = shortcut;
                   const room = mx.getRoom(sRoomId);
                   return (
diff --git a/src/client/event/roomList.js b/src/client/event/roomList.js
new file mode 100644
index 0000000..0b88e0c
--- /dev/null
+++ b/src/client/event/roomList.js
@@ -0,0 +1,19 @@
+import cons from '../state/cons';
+import navigation from '../state/navigation';
+import { selectTab, selectSpace } from '../action/navigation';
+
+const listenRoomLeave = (roomId) => {
+  const lRoomIndex = navigation.selectedSpacePath.indexOf(roomId);
+  if (lRoomIndex === -1) return;
+  if (lRoomIndex === 0) selectTab(cons.tabs.HOME);
+  else selectSpace(navigation.selectedSpacePath[lRoomIndex - 1]);
+};
+
+function initRoomListListener(roomList) {
+  roomList.on(cons.events.roomList.ROOM_LEAVED, listenRoomLeave);
+}
+function removeRoomListListener(roomList) {
+  roomList.removeListener(cons.events.roomList.ROOM_LEAVED, listenRoomLeave);
+}
+
+export { initRoomListListener, removeRoomListListener };
diff --git a/src/client/initMatrix.js b/src/client/initMatrix.js
index 84e388e..ce5bf64 100644
--- a/src/client/initMatrix.js
+++ b/src/client/initMatrix.js
@@ -7,6 +7,7 @@ import RoomList from './state/RoomList';
 import RoomsInput from './state/RoomsInput';
 import Notifications from './state/Notifications';
 import { initHotkeys } from './event/hotkeys';
+import { initRoomListListener } from './event/roomList';
 
 global.Olm = require('@matrix-org/olm');
 
@@ -64,6 +65,7 @@ class InitMatrix extends EventEmitter {
           this.roomsInput = new RoomsInput(this.matrixClient);
           this.notifications = new Notifications(this.roomList);
           initHotkeys();
+          initRoomListListener(this.roomList);
           this.emit('init_loading_finished');
         }
       },