The role-conversion of the international pattern is not only the symbol of the end of the cold war, but also the inevitable result caused by the change of situation of the international communities. This paper argues that, after the Cold War, due to the wide-spread of international terrorism, the proliferation of weapons of mass destruction, the deterioration of the clashes caused by culture differences, the world undergoes unprecedented transformation. This transformation is shown in the following aspects: the non-Western civilizations in political and social dimensions is awakening in regions such as Eastern Europe, Central Asia, Western Asia and North Africa; Israelization, Balkanization, Talibanization, and New Monroe Doctrine, all of which caused regional security porosity; Traditional forces represented by the United States, challenging powers represented by Europe, small and medium-developed countries represented by Russia, developing countries represented by China, are cooperating together leading to increasing fragments of our world . Based on the fact mentioned above, this paper also analyzes the fundamental reason which caused the role-conversion of international pattern: the problematic old international economic and political institution dominated by the western world, the lack of sense of regional identity in developing countries, and the rise of the new emerging economies.