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-continue>
    <allimages aicontinue="Webwxgetmsgimg.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="Hybrid插画.jpg" timestamp="2014-03-25T06:59:14Z" url="http://wiki.mianfeiwucan.org/images/8/8d/Hybrid%E6%8F%92%E7%94%BB.jpg" descriptionurl="http://wiki.mianfeiwucan.org/index.php/%E6%96%87%E4%BB%B6:Hybrid%E6%8F%92%E7%94%BB.jpg" ns="6" title="文件:Hybrid插画.jpg" />
      <img name="IMG_20140506_103032.jpg" timestamp="2014-05-06T02:39:49Z" url="http://wiki.mianfeiwucan.org/images/8/84/IMG_20140506_103032.jpg" descriptionurl="http://wiki.mianfeiwucan.org/index.php/%E6%96%87%E4%BB%B6:IMG_20140506_103032.jpg" ns="6" title="文件:IMG 20140506 103032.jpg" />
      <img name="Jiongming照片.jpg" timestamp="2014-05-13T09:44:39Z" url="http://wiki.mianfeiwucan.org/images/1/15/Jiongming%E7%85%A7%E7%89%87.jpg" descriptionurl="http://wiki.mianfeiwucan.org/index.php/%E6%96%87%E4%BB%B6:Jiongming%E7%85%A7%E7%89%87.jpg" ns="6" title="文件:Jiongming照片.jpg" />
      <img name="Ming.jpg" timestamp="2014-05-13T09:46:35Z" url="http://wiki.mianfeiwucan.org/images/2/2a/Ming.jpg" descriptionurl="http://wiki.mianfeiwucan.org/index.php/%E6%96%87%E4%BB%B6:Ming.jpg" ns="6" title="文件:Ming.jpg" />
      <img name="Mmexport1399864500545.jpg" timestamp="2014-05-12T03:15:56Z" url="http://wiki.mianfeiwucan.org/images/8/89/Mmexport1399864500545.jpg" descriptionurl="http://wiki.mianfeiwucan.org/index.php/%E6%96%87%E4%BB%B6:Mmexport1399864500545.jpg" ns="6" title="文件:Mmexport1399864500545.jpg" />
      <img name="Psb.jpg" timestamp="2014-03-26T08:10:56Z" url="http://wiki.mianfeiwucan.org/images/a/a9/Psb.jpg" descriptionurl="http://wiki.mianfeiwucan.org/index.php/%E6%96%87%E4%BB%B6:Psb.jpg" ns="6" title="文件:Psb.jpg" />
      <img name="Psu.jpg" timestamp="2014-03-25T08:04:00Z" url="http://wiki.mianfeiwucan.org/images/f/f0/Psu.jpg" descriptionurl="http://wiki.mianfeiwucan.org/index.php/%E6%96%87%E4%BB%B6:Psu.jpg" ns="6" title="文件:Psu.jpg" />
      <img name="QQ图片20140504110534.jpg" timestamp="2014-05-04T03:06:10Z" url="http://wiki.mianfeiwucan.org/images/8/8d/QQ%E5%9B%BE%E7%89%8720140504110534.jpg" descriptionurl="http://wiki.mianfeiwucan.org/index.php/%E6%96%87%E4%BB%B6:QQ%E5%9B%BE%E7%89%8720140504110534.jpg" ns="6" title="文件:QQ图片20140504110534.jpg" />
      <img name="QQ图片20140504110720.jpg" timestamp="2014-05-04T03:07:59Z" url="http://wiki.mianfeiwucan.org/images/4/48/QQ%E5%9B%BE%E7%89%8720140504110720.jpg" descriptionurl="http://wiki.mianfeiwucan.org/index.php/%E6%96%87%E4%BB%B6:QQ%E5%9B%BE%E7%89%8720140504110720.jpg" ns="6" title="文件:QQ图片20140504110720.jpg" />
      <img name="QQ截图20140325150422.png" timestamp="2014-03-25T07:04:36Z" url="http://wiki.mianfeiwucan.org/images/3/3e/QQ%E6%88%AA%E5%9B%BE20140325150422.png" descriptionurl="http://wiki.mianfeiwucan.org/index.php/%E6%96%87%E4%BB%B6:QQ%E6%88%AA%E5%9B%BE20140325150422.png" ns="6" title="文件:QQ截图20140325150422.png" />
    </allimages>
  </query>
</api>