diff --git a/docs/icon128.png b/docs/icon128.png
new file mode 100644
index 0000000..2a6ea8e
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diff --git a/docs/images/mini.jpg b/docs/images/mini.jpg
deleted file mode 100644
index 5531765..0000000
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diff --git a/source/src/devtools/settings.ts b/source/src/devtools/settings.ts
new file mode 100644
index 0000000..5ad3bf2
--- /dev/null
+++ b/source/src/devtools/settings.ts
@@ -0,0 +1,45 @@
+const Key = "settings";
+
+export const RefreshManual = "manual";
+export const RefreshAuto = "auto";
+
+interface SettingsData {
+  refreshType: string;
+  refreshTime: number;
+}
+
+let defaultData: SettingsData = {
+  refreshTime: 100,
+  refreshType: RefreshManual,
+}
+
+class Settings {
+  public data: SettingsData | null = null;
+
+  constructor() {
+    this.init();
+  }
+
+  private init() {
+    const data = localStorage.getItem(Key)
+    if (data) {
+      try {
+        this.data = JSON.parse(data)
+      } catch (e) {
+        this.data = defaultData;
+      }
+    }
+    this.data = Object.assign(defaultData, this.data)
+  }
+
+  isManualRefresh() {
+    return this.data?.refreshType === RefreshManual;
+  }
+
+  save() {
+    const str = JSON.stringify(this.data);
+    localStorage.setItem(Key, str);
+  }
+}
+
+export const settings = new Settings();
diff --git a/source/src/devtools/ui/index.vue b/source/src/devtools/ui/index.vue
index 798078a..e7756e4 100644
--- a/source/src/devtools/ui/index.vue
+++ b/source/src/devtools/ui/index.vue
@@ -1,5 +1,14 @@
 <template>
   <div id="devtools">
+    <el-drawer
+        title="settings"
+        direction="btt"
+        @close="onCloseSettings"
+        :visible.sync="showSettings">
+      <div>
+        <settings-vue></settings-vue>
+      </div>
+    </el-drawer>
     <div class="head" v-show="iframes.length>1">
       <div class="label">inspect target:</div>
       <el-select v-model="frameID" placeholder="请选择" @change="onChangeFrame" style="flex:1;">
@@ -18,10 +27,11 @@
       </div>
       <div class="left">
         <div class="tool-btn">
-          <el-switch v-if="false" active-text="实时监控" v-model="watchEveryTime" @change="onChangeWatchState"></el-switch>
-          <div style="padding-left: 15px;">节点树</div>
-          <div class="flex1"></div>
-          <el-button type="success" class="el-icon-refresh" @click="onBtnClickUpdateTree"></el-button>
+          <div style="padding-left: 15px;flex:1;">Node Tree</div>
+          <el-button v-show="isShowRefreshBtn" type="success" class="el-icon-refresh"
+                     size="mini"
+                     @click="onBtnClickUpdateTree"></el-button>
+          <el-button @click="onClickSettings">set</el-button>
         </div>
         <el-input placeholder="输入关键字进行过滤" v-model="filterText">
           <template slot="append">
@@ -75,10 +85,13 @@ import {Msg, Page, PluginEvent} from "@/core/types"
 import {connectBackground} from "@/devtools/connectBackground";
 import {EngineData, FrameDetails, Info, ObjectData, ObjectItemRequestData, TreeData} from "@/devtools/data";
 import Bus, {BusMsg} from "@/devtools/bus";
+import settingsVue from "./settings.vue"
+import {RefreshAuto, RefreshManual, settings} from "@/devtools/settings";
 
 @Component({
   components: {
     properties,
+    settingsVue,
   }
 })
 export default class Index extends Vue {
@@ -105,18 +118,41 @@ export default class Index extends Vue {
     this.updateFilterText(this.filterText);
   }
 
+  private showSettings = false;
+
+  onClickSettings() {
+    this.showSettings = true;
+  }
+
+  private isShowRefreshBtn = false;
+
+  onCloseSettings() {
+    if (settings.data) {
+      const {refreshType, refreshTime} = settings.data;
+      switch (refreshType) {
+        case RefreshAuto: {
+          this.isShowRefreshBtn = false;
+          this.onEnableTreeWatch(true, refreshTime)
+          break;
+        }
+        case RefreshManual: {
+          this.isShowRefreshBtn = true;
+          this.onEnableTreeWatch(false)
+        }
+      }
+    }
+  }
+
   // el-tree的渲染key
   defaultProps = {
     children: "children",
     label: "name"
   };
-  private watchEveryTime: boolean = false;// 实时监控节点树
-
   memory = {
     performance: {},
     console: {},
   }
-  timerID: number = 0;
+  timerID: number | null = null;
 
 
   private requestList: Array<{ id: string, cb: Function }> = [];
@@ -241,6 +277,10 @@ export default class Index extends Vue {
     this.treeItemData = [];
   }
 
+  mounted() {
+    this.onCloseSettings();
+  }
+
   _initChromeRuntimeConnect() {
     const msgFunctionMap: Record<string, Function> = {};
     msgFunctionMap[Msg.TreeInfo] = this._onMsgTreeInfo;
@@ -340,16 +380,24 @@ export default class Index extends Vue {
     }
   }
 
-  onChangeWatchState() {
-    if (this.watchEveryTime) {
+  onEnableTreeWatch(watch: boolean, time = 300) {
+    if (watch) {
+      this._clearTimer();
       this.timerID = setInterval(() => {
         this.onBtnClickUpdateTree();
         if (this.selectedUUID) {
           this.sendMsgToContentScript(Msg.NodeInfo, this.selectedUUID);
         }
-      }, 300);
+      }, time);
     } else {
+      this._clearTimer();
+    }
+  }
+
+  private _clearTimer() {
+    if (this.timerID !== null) {
       clearInterval(this.timerID);
+      this.timerID = null;
     }
   }
 
diff --git a/source/src/devtools/ui/settings-prop.vue b/source/src/devtools/ui/settings-prop.vue
new file mode 100644
index 0000000..a29e4b0
--- /dev/null
+++ b/source/src/devtools/ui/settings-prop.vue
@@ -0,0 +1,48 @@
+<template>
+  <div class="settings-prop">
+    <span class="label">{{ label }}</span>
+    <slot class="slot"></slot>
+  </div>
+</template>
+
+<script lang="ts">
+import Vue from "vue";
+import Component from "vue-class-component";
+import {Prop} from "vue-property-decorator";
+
+@Component({
+  name: "SettingsProp",
+  components: {}
+})
+export default class SettingsProp extends Vue {
+  @Prop()
+  label!: string;
+
+  created() {
+  }
+
+  mounted() {
+  }
+}
+</script>
+
+<style scoped lang="less">
+.settings-prop {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  min-width: 300px;
+  margin: 2px 4px;
+
+  .label {
+    max-width: 80px;
+    min-width: 80px;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
+
+  .slot {
+    flex: 1;
+  }
+}
+</style>
diff --git a/source/src/devtools/ui/settings.vue b/source/src/devtools/ui/settings.vue
new file mode 100644
index 0000000..27723a9
--- /dev/null
+++ b/source/src/devtools/ui/settings.vue
@@ -0,0 +1,75 @@
+<template>
+  <div class="settings">
+    <settings-prop label="refresh">
+      <el-select v-model="refreshType" @change="onCommonSave" style="flex:1;">
+        <el-option v-for="item in refreshOptions" :key="item.value" :label="item.label" :value="item.value">
+        </el-option>
+      </el-select>
+    </settings-prop>
+    <settings-prop label="refresh time: " v-show="isRefreshAuto()">
+      <el-input-number style="flex:1;" :min=100 v-model="refreshTime" @change="onCommonSave"></el-input-number>
+      <span>ms</span>
+    </settings-prop>
+
+    <!--        <el-dropdown>-->
+    <!--          <span>refresh</span>-->
+    <!--          <el-dropdown-menu slot="dropdown">-->
+    <!--            <el-dropdown-item>auto</el-dropdown-item>-->
+    <!--            <el-dropdown-item>Manual</el-dropdown-item>-->
+    <!--          </el-dropdown-menu>-->
+    <!--        </el-dropdown>-->
+  </div>
+</template>
+
+<script lang="ts">
+import Vue from "vue";
+import Component from "vue-class-component";
+import {Prop} from "vue-property-decorator";
+import {RefreshAuto, RefreshManual, settings} from "@/devtools/settings";
+import SettingsProp from "@/devtools/ui/settings-prop.vue";
+
+
+@Component({
+  name: "Settings",
+  components: {SettingsProp}
+})
+export default class Settings extends Vue {
+  name: string = "settings";
+  refreshOptions = [
+    {label: "auto", value: RefreshAuto},
+    {label: "manual", value: RefreshManual}
+  ]
+  refreshType = "";
+  refreshTime = 100;
+
+  isRefreshAuto() {
+    return this.refreshType === RefreshAuto;
+  }
+
+  created() {
+    this.refreshType = settings.data?.refreshType || "";
+    this.refreshTime = settings.data?.refreshTime || 100;
+  }
+
+  onChangeRefreshType() {
+
+  }
+
+  onCommonSave() {
+    if (settings.data) {
+      settings.data.refreshType = this.refreshType;
+      settings.data.refreshTime = this.refreshTime;
+      settings.save();
+    }
+  }
+
+  mounted() {
+  }
+}
+</script>
+
+<style scoped lang="less">
+.settings {
+
+}
+</style>