You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <allimages>
      <img name="Chinaa02.gif" timestamp="2014-03-30T10:46:02Z" url="http://art.uneedadv.com/tw/images/6/69/Chinaa02.gif" descriptionurl="http://art.uneedadv.com/tw/File:Chinaa02.gif" ns="6" title="File:Chinaa02.gif" />
      <img name="Chinaa11.gif" timestamp="2014-03-30T10:46:20Z" url="http://art.uneedadv.com/tw/images/8/85/Chinaa11.gif" descriptionurl="http://art.uneedadv.com/tw/File:Chinaa11.gif" ns="6" title="File:Chinaa11.gif" />
      <img name="台灣室內設計裝修.jpg" timestamp="2014-07-11T17:03:49Z" url="http://art.uneedadv.com/tw/images/7/72/%E5%8F%B0%E7%81%A3%E5%AE%A4%E5%85%A7%E8%A8%AD%E8%A8%88%E8%A3%9D%E4%BF%AE.jpg" descriptionurl="http://art.uneedadv.com/tw/File:%E5%8F%B0%E7%81%A3%E5%AE%A4%E5%85%A7%E8%A8%AD%E8%A8%88%E8%A3%9D%E4%BF%AE.jpg" ns="6" title="File:台灣室內設計裝修.jpg" />
      <img name="台灣室內設計裝修2.gif" timestamp="2014-07-10T09:08:22Z" url="http://art.uneedadv.com/tw/images/f/fc/%E5%8F%B0%E7%81%A3%E5%AE%A4%E5%85%A7%E8%A8%AD%E8%A8%88%E8%A3%9D%E4%BF%AE2.gif" descriptionurl="http://art.uneedadv.com/tw/File:%E5%8F%B0%E7%81%A3%E5%AE%A4%E5%85%A7%E8%A8%AD%E8%A8%88%E8%A3%9D%E4%BF%AE2.gif" ns="6" title="File:台灣室內設計裝修2.gif" />
      <img name="台灣室內設計裝修2.jpg" timestamp="2014-07-11T17:20:13Z" url="http://art.uneedadv.com/tw/images/7/7e/%E5%8F%B0%E7%81%A3%E5%AE%A4%E5%85%A7%E8%A8%AD%E8%A8%88%E8%A3%9D%E4%BF%AE2.jpg" descriptionurl="http://art.uneedadv.com/tw/File:%E5%8F%B0%E7%81%A3%E5%AE%A4%E5%85%A7%E8%A8%AD%E8%A8%88%E8%A3%9D%E4%BF%AE2.jpg" ns="6" title="File:台灣室內設計裝修2.jpg" />
      <img name="商情百科20150702.gif" timestamp="2015-07-02T14:35:23Z" url="http://art.uneedadv.com/tw/images/f/f1/%E5%95%86%E6%83%85%E7%99%BE%E7%A7%9120150702.gif" descriptionurl="http://art.uneedadv.com/tw/File:%E5%95%86%E6%83%85%E7%99%BE%E7%A7%9120150702.gif" ns="6" title="File:商情百科20150702.gif" />
      <img name="許盈宜藝術包.gif" timestamp="2014-03-30T10:46:38Z" url="http://art.uneedadv.com/tw/images/d/de/%E8%A8%B1%E7%9B%88%E5%AE%9C%E8%97%9D%E8%A1%93%E5%8C%85.gif" descriptionurl="http://art.uneedadv.com/tw/File:%E8%A8%B1%E7%9B%88%E5%AE%9C%E8%97%9D%E8%A1%93%E5%8C%85.gif" ns="6" title="File:許盈宜藝術包.gif" />
      <img name="鄭鴻文(書法家).jpg" timestamp="2015-06-24T15:17:22Z" url="http://art.uneedadv.com/tw/images/f/f3/%E9%84%AD%E9%B4%BB%E6%96%87%28%E6%9B%B8%E6%B3%95%E5%AE%B6%29.jpg" descriptionurl="http://art.uneedadv.com/tw/File:%E9%84%AD%E9%B4%BB%E6%96%87(%E6%9B%B8%E6%B3%95%E5%AE%B6).jpg" ns="6" title="File:鄭鴻文(書法家).jpg" />
      <img name="鄭鴻文.gif" timestamp="2014-03-30T10:46:53Z" url="http://art.uneedadv.com/tw/images/9/98/%E9%84%AD%E9%B4%BB%E6%96%87.gif" descriptionurl="http://art.uneedadv.com/tw/File:%E9%84%AD%E9%B4%BB%E6%96%87.gif" ns="6" title="File:鄭鴻文.gif" />
    </allimages>
  </query>
</api>