This article first traces the origin of four concepts: International Politics (IP), International Relations (IR), World Politics (WP) and Global Politics (GP) and discusses the similarities among these four paradigms. It then analyses their application both at home and abroad. Finally, it argues for the desirability of selecting the concept of IP in academic training, thus facilitating practical application of concepts. It asserts that this will not only enhance academic discussion about IP among different Chinese schools of thought, but also help blazing new ideas.