I have an internet site build in php. There's a login section using facebook userid and password.

Things I require is: If any user login utilizing their facebook userid and password they'll see their facebook Picture album during my website.

Yes, it is definitely possible but I am the inability to do that.

Help me by providing detail how to get this done.

http://developers.facebook.com/docs/reference/api/

^^^ That's where to begin. They provide particulars regarding how to pull various kinds of information from profiles or pages.