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>
    <alllinks galcontinue="愛藝術_關於我們|67" />
  </query-continue>
  <query>
    <pages>
      <page pageid="3" ns="0" title="首頁" />
      <page pageid="14" ns="10" title="Template:藝術家模版ZZZAA04" />
      <page pageid="15" ns="0" title="新聞中心" />
      <page pageid="22" ns="0" title="藝術家" />
      <page pageid="31" ns="0" title="施志剛" />
      <page pageid="55" ns="0" title="施志剛 作品圖片" />
      <page pageid="61" ns="0" title="施志剛 作品圖片:醉翁" />
      <page pageid="64" ns="0" title="施志剛 作品圖片:幼樂尋歡" />
      <page pageid="65" ns="0" title="施志剛 作品圖片:千年老伴" />
      <page pageid="66" ns="0" title="施志剛 作品圖片:地久天長" />
    </pages>
  </query>
</api>