This paper relates to a software patent of a computer related invention, explains a describing method of software patent claim which can be registered software patent of computer related invention instead of computer program copyright which is the Intellectual Property about software since 1998 in the Korea Intellectual Patent Office(KIPO) by developing an information communication infrastructure technology and WWW technology. Also, it introduces an international and domestic trends of the software patent for computer related invention and related database for the software patent of the world and mentions advantage and disadvantage of software patent regime of each nation and the facing software patent problems as the Intellectual Property.