diff --git a/demo/index.tsx b/demo/index.tsx
index 44688b5..c2f7d68 100644
--- a/demo/index.tsx
+++ b/demo/index.tsx
@@ -129,9 +129,17 @@ class App extends React.Component<any, Partial<State>> {
           onClose={() => { this.setState({ visible: false }); } }
           images={images}
           activeIndex={this.state.activeIndex}
-          attribute={false}
           container={inline ? this.container : null}
           downloadable
+          customToolbar={(toolbars) => {
+            return toolbars.concat([{
+              key: 'test',
+              render: <div>C</div>,
+              onClick: (activeImage) => {
+                console.log(activeImage);
+              },
+            }]);
+          }}
           />
         </div>
         <div className="footer">
diff --git a/src/ViewerCore.tsx b/src/ViewerCore.tsx
index 417baa3..d2893f3 100644
--- a/src/ViewerCore.tsx
+++ b/src/ViewerCore.tsx
@@ -2,8 +2,8 @@ import * as React from 'react';
 import './style/index.less';
 import ViewerCanvas from './ViewerCanvas';
 import ViewerNav from './ViewerNav';
-import ViewerToolbar from './ViewerToolbar';
-import ViewerProps, { ImageDecorator } from './ViewerProps';
+import ViewerToolbar, { defaultToolbars } from './ViewerToolbar';
+import ViewerProps, { ImageDecorator, ToolbarConfig } from './ViewerProps';
 import Icon, { ActionType } from './Icon';
 
 function noop() {}
@@ -41,6 +41,7 @@ export default class ViewerCore extends React.Component<ViewerProps, ViewerCoreS
     scalable: true,
     onMaskClick: noop,
     changeable: true,
+    customToolbar: (toolbars) => toolbars,
   };
 
   private prefixCls: string;
@@ -228,7 +229,7 @@ export default class ViewerCore extends React.Component<ViewerProps, ViewerCoreS
     });
   }
 
-  handleAction(type: ActionType) {
+  handleDefaultAction = (type: ActionType) => {
     switch (type) {
       case ActionType.prev:
         if (this.state.activeIndex - 1 >= 0) {
@@ -271,6 +272,15 @@ export default class ViewerCore extends React.Component<ViewerProps, ViewerCoreS
     }
   }
 
+  handleAction(config: ToolbarConfig) {
+    this.handleDefaultAction(config.actionType);
+
+    if (config.onClick) {
+      const activeImage = this.getActiveImage();
+      config.onClick(activeImage);
+    }
+  }
+
   handleDownload = () => {
     const activeImage = this.getActiveImage();
     if (activeImage.downloadUrl) {
@@ -380,29 +390,29 @@ export default class ViewerCore extends React.Component<ViewerProps, ViewerCoreS
       // key: ←
       case 37:
         if (e.ctrlKey) {
-          this.handleAction(ActionType.rotateLeft);
+          this.handleDefaultAction(ActionType.rotateLeft);
         } else {
-          this.handleAction(ActionType.prev);
+          this.handleDefaultAction(ActionType.prev);
         }
         isFeatrue = true;
         break;
       // key: →
       case 39:
         if (e.ctrlKey) {
-          this.handleAction(ActionType.rotateRight);
+          this.handleDefaultAction(ActionType.rotateRight);
         } else {
-          this.handleAction(ActionType.next);
+          this.handleDefaultAction(ActionType.next);
         }
         isFeatrue = true;
         break;
       // key: ↑
       case 38:
-        this.handleAction(ActionType.zoomIn);
+        this.handleDefaultAction(ActionType.zoomIn);
         isFeatrue = true;
         break;
       // key: ↓
       case 40:
-        this.handleAction(ActionType.zoomOut);
+        this.handleDefaultAction(ActionType.zoomOut);
         isFeatrue = true;
         break;
       // key: Ctrl + 1
@@ -575,6 +585,7 @@ export default class ViewerCore extends React.Component<ViewerProps, ViewerCoreS
                 changeable={this.props.changeable}
                 downloadable={this.props.downloadable}
                 noImgDetails={this.props.noImgDetails}
+                toolbars={this.props.customToolbar(defaultToolbars)}
               />
             )}
             {this.props.noNavbar || (
diff --git a/src/ViewerProps.ts b/src/ViewerProps.ts
index e8b525b..3ffc831 100644
--- a/src/ViewerProps.ts
+++ b/src/ViewerProps.ts
@@ -4,6 +4,13 @@ export interface ImageDecorator {
   downloadUrl?: string;
 }
 
+export interface ToolbarConfig {
+  key: string;
+  actionType?: number;
+  render?: React.ReactNode;
+  onClick?: (activeImage: ImageDecorator) => void;
+}
+
 interface ViewerProps {
   /** viewer是否可见 */
   visible?: boolean;
@@ -49,6 +56,9 @@ interface ViewerProps {
 
   // wheather to show change button
   changeable?: boolean;
+
+  // custom toolbar
+  customToolbar?: (toolbars: ToolbarConfig[]) => ToolbarConfig[];
 }
 
 export default ViewerProps;
diff --git a/src/ViewerToolbar.tsx b/src/ViewerToolbar.tsx
index 8919f6c..4bcc568 100644
--- a/src/ViewerToolbar.tsx
+++ b/src/ViewerToolbar.tsx
@@ -1,9 +1,10 @@
 import * as React from 'react';
 import Icon, { ActionType } from './Icon';
+import { ToolbarConfig } from './ViewerProps';
 
 export interface ViewerToolbarProps {
   prefixCls: string;
-  onAction: (type: ActionType) => void;
+  onAction: (config: ToolbarConfig) => void;
   alt: string;
   width: number;
   height: number;
@@ -14,6 +15,56 @@ export interface ViewerToolbarProps {
   changeable: boolean;
   downloadable: boolean;
   noImgDetails: boolean;
+  toolbars: ToolbarConfig[];
+}
+
+export const defaultToolbars: ToolbarConfig[] = [
+ {
+   key: 'zoomIn',
+   actionType: ActionType.zoomIn,
+ },
+ {
+   key: 'zoomOut',
+   actionType: ActionType.zoomOut,
+ },
+ {
+   key: 'prev',
+   actionType: ActionType.prev,
+ },
+ {
+   key: 'reset',
+   actionType: ActionType.reset,
+ },
+ {
+   key: 'next',
+   actionType: ActionType.next,
+ },
+ {
+   key: 'rotateLeft',
+   actionType: ActionType.rotateLeft,
+ },
+ {
+   key: 'rotateRight',
+   actionType: ActionType.rotateRight,
+ },
+ {
+   key: 'scaleX',
+   actionType: ActionType.scaleX,
+ },
+ {
+   key: 'scaleY',
+   actionType: ActionType.scaleY,
+ },
+ {
+   key: 'download',
+   actionType: ActionType.download,
+ },
+];
+
+function deleteToolbarFromKey(toolbars: ToolbarConfig[], keys: string[]) {
+  const targetToolbar = toolbars.filter(item => keys.indexOf(item.key) < 0);
+
+  return targetToolbar;
 }
 
 export default class ViewerToolbar extends React.Component<ViewerToolbarProps, any> {
@@ -22,8 +73,29 @@ export default class ViewerToolbar extends React.Component<ViewerToolbarProps, a
     super();
   }
 
-  handleAction(type: ActionType) {
-    this.props.onAction(type);
+  handleAction(config: ToolbarConfig) {
+    this.props.onAction(config);
+  }
+
+  renderAction = (config: ToolbarConfig) => {
+    let content = null;
+    // default toolbar
+    if (typeof ActionType[config.actionType] !== 'undefined') {
+      content = <Icon type={config.actionType}/>;
+    }
+    // extra toolbar
+    if (config.render) {
+      content = config.render;
+    }
+    return (
+      <li
+        key={config.key}
+        className={`${this.props.prefixCls}-btn`}
+        onClick={() => {this.handleAction(config);}}
+      >
+          {content}
+      </li>
+    );
   }
 
   render() {
@@ -33,96 +105,29 @@ export default class ViewerToolbar extends React.Component<ViewerToolbarProps, a
         {this.props.noImgDetails || `(${this.props.width} x ${this.props.height})`}
       </p>
     ) : null;
-    let featureNodeArr = [];
-    if (this.props.zoomable) {
-      featureNodeArr = featureNodeArr.concat([
-        <li
-        key="zoomIn"
-        className={`${this.props.prefixCls}-btn`}
-        onClick={() => {this.handleAction(ActionType.zoomIn);}}>
-          <Icon type={ActionType.zoomIn}/>
-        </li>,
-        <li
-        key="zoomOut"
-        className={`${this.props.prefixCls}-btn`}
-        onClick={() => {this.handleAction(ActionType.zoomOut);}}>
-          <Icon type={ActionType.zoomOut}/>
-        </li>,
-      ]);
+    let toolbars = this.props.toolbars;
+    if (!this.props.zoomable) {
+      toolbars = deleteToolbarFromKey(toolbars, ['zoomIn', 'zoomOut']);
     }
-    const resetTool = (
-      <li
-      key="reset"
-      className={`${this.props.prefixCls}-btn`} onClick={() => {this.handleAction(ActionType.reset);}}>
-        <Icon type={ActionType.reset}/>
-      </li>
-    );
-    if (this.props.changeable) {
-      featureNodeArr = featureNodeArr.concat([
-        <li
-        key="prev"
-        className={`${this.props.prefixCls}-btn`} onClick={() => {this.handleAction(ActionType.prev);}}>
-          <Icon type={ActionType.prev}/>
-        </li>,
-        resetTool,
-        <li
-        key="next"
-        className={`${this.props.prefixCls}-btn`} onClick={() => {this.handleAction(ActionType.next);}}>
-          <Icon type={ActionType.next}/>
-        </li>,
-      ]);
-    } else {
-      featureNodeArr = featureNodeArr.concat([
-        resetTool,
-      ]);
+    if (!this.props.changeable) {
+      toolbars = deleteToolbarFromKey(toolbars, ['prev', 'next']);
     }
-    if (this.props.rotatable) {
-      featureNodeArr = featureNodeArr.concat([
-        <li
-        key="rotateLeft"
-        className={`${this.props.prefixCls}-btn`}
-        onClick={() => {this.handleAction(ActionType.rotateLeft);}}>
-          <Icon type={ActionType.rotateLeft}/>
-        </li>,
-        <li
-        key="rotateRight"
-        className={`${this.props.prefixCls}-btn`}
-        onClick={() => {this.handleAction(ActionType.rotateRight);}}>
-          <Icon type={ActionType.rotateRight}/>
-        </li>,
-      ]);
+    if (!this.props.rotatable) {
+      toolbars = deleteToolbarFromKey(toolbars, ['rotateLeft', 'rotateRight']);
     }
-    if (this.props.scalable) {
-      featureNodeArr = featureNodeArr.concat([
-        <li
-        key="scaleX"
-        className={`${this.props.prefixCls}-btn`}
-        onClick={() => {this.handleAction(ActionType.scaleX);}}>
-          <Icon type={ActionType.scaleX}/>
-        </li>,
-        <li
-        key="scaleY"
-        className={`${this.props.prefixCls}-btn`}
-        onClick={() => {this.handleAction(ActionType.scaleY);}}>
-          <Icon type={ActionType.scaleY}/>
-        </li>,
-      ]);
+    if (!this.props.scalable) {
+      toolbars = deleteToolbarFromKey(toolbars, ['scaleX', 'scaleY']);
     }
-    if (this.props.downloadable) {
-      featureNodeArr = featureNodeArr.concat([
-        <li
-        key="download"
-        className={`${this.props.prefixCls}-btn`}
-        onClick={() => {this.handleAction(ActionType.download);}}>
-          <Icon type={ActionType.download}/>
-        </li>,
-      ]);
+    if (!this.props.downloadable) {
+      toolbars = deleteToolbarFromKey(toolbars, ['download']);
     }
     return (
       <div>
         {attributeNode}
         <ul className={`${this.props.prefixCls}-toolbar`}>
-          {featureNodeArr}
+          {toolbars.map(item => {
+            return this.renderAction(item);
+          })}
         </ul>
       </div>
     );
diff --git a/src/style/index.less b/src/style/index.less
index b8109b1..d213bc7 100644
--- a/src/style/index.less
+++ b/src/style/index.less
@@ -52,6 +52,7 @@
 
   &-btn {
     background-color: @btn-background-color;
+    color: white;
   }
 
   &-btn:hover{
@@ -132,7 +133,7 @@
     border-radius: @toolbarHeight;
     margin-right: 3px;
     cursor: pointer;
-    line-height: 29px;
+    line-height: 28px;
   }
 
   &-toolbar li:hover {