Which of the systems of government claims to be a form of government that supposedly uses a system of laws and administrative practices that are in keeping with the will of a Supreme Being?

Check this site for your answer.

http://www.newadvent.org/cathen/14568a.htm

I think what you are looking for is a "theocracy". This site will give you more information.
http://en.wikipedia.org/wiki/Theocracy