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>
    <allfileusages gafcontinue="教育自造者計畫預算表.png" />
  </query-continue>
  <query>
    <pages>
      <page ns="6" title="檔案:Example.jpg" missing="" />
      <page ns="6" title="檔案:File.ogg" missing="" />
      <page ns="6" title="檔案:PascalTriangleAnimated2.gif" missing="" />
      <page ns="6" title="檔案:微型資料中心.jpg" missing="" />
      <page pageid="2" ns="6" title="檔案:Go top.gif" />
      <page pageid="107" ns="6" title="檔案:WP action&amp;filter.png" />
      <page pageid="29" ns="6" title="檔案:平均行政員額分布圖.png" />
      <page pageid="90" ns="6" title="檔案:授課節數調整後尚需員額.jpg" />
      <page pageid="91" ns="6" title="檔案:授課節數調整後尚需外加比率.jpg" />
      <page pageid="294" ns="6" title="檔案:教育自造者計畫期程.png" />
    </pages>
  </query>
</api>