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 gaicontinue="ATM_통장_수표_현금.JPG" />
  </query-continue>
  <query>
    <pages>
      <page pageid="9620" ns="6" title="File:12345.JPG" />
      <page pageid="3584" ns="6" title="File:5만원.JPG" />
      <page pageid="14370" ns="6" title="File:93562CDE-1D11-4DE2-814F-05A46A534986.png" />
      <page pageid="538" ns="6" title="File:ATM.JPG" />
      <page pageid="1346" ns="6" title="File:ATM2.mp3" />
      <page pageid="4609" ns="6" title="File:ATM KB new.JPG" />
      <page pageid="3004" ns="6" title="File:ATM RF.JPG" />
      <page pageid="3003" ns="6" title="File:ATM above screen.JPG" />
      <page pageid="3091" ns="6" title="File:ATM 사용가능.JPG" />
      <page pageid="1345" ns="6" title="File:ATM 새마을금고.mp3" />
    </pages>
  </query>
</api>