I have one application that register and verified user's fingerprint.Now I want to know which finger user try to register so, Is there anything common between all humans finger that we can identify the same ?
There is a lot of literature on the problem of finger print analysis recognition. I suggest that you start with the Wikipedia pages on fingerprint classification and fingerprint recognition.
A quick browse through the Wikipedia pages doesn't show any obvious way to determine that a given print is (say) for someone's pinky on their left hand. (But then again, I'm not sure why you'd want to know that ...)