i am talking about i wish to begin to see the source file from the primary page. after i click right click and choice the choice view source, so i wish to find the "body" from the file,and edit it physical, which folder can one think it is ? thanks buddies.

WordPress's HTML is produced by PHP along with CSS, so try looking in your active theme folder in wordpress-content/styles/yourtheme. You will find all of the areas of a WordPress theme: Using Themes « WordPress Codex.

WordPress works on the server -- the "source" you are viewing out of your browser is client-side, and it is basically the creation of the WordPress PHP code that creates the web pages (plus some CSS transforms). To be able to begin to see the PHP source, you will need to download it from WordPress's website yourself or review your Wordpress installation directory in your server.