Abstract Susan Strange who is British, female, a master and a mother of six children. This woman can be one of us but who has much rich life than anyone. She is foundation of IPE of British, and foundation of British International Studies Association (BISA), and who also is one of two non-American chairmen of American International Relations Association (ISA) in 20 century. She also visits many countries worldwide American, European, Asia and Australia areas for promote her ideas of IPE, which should be an open field for each subject of Social Science, and the research approach should be multi-value and multi-approach. Even in such busy life, Strange still published lots articles and books, and the ideas also spirit lots people who is contemporary with her or later. Strange is a representative of IPE in 20 century. Strange¡¦s Structural Power Analysis has become a framework of many IPE textbooks and her New Diplomacy also point out a new trend of Diplomacy. In the overseas, the research of her is important and popular. But in Taiwan, We can¡¦t find any research about her and her theories; even some articles may be mention about her name or her theory parts. Therefore, A research of theories of Strange is essential and important work for research circle of IPE in Taiwan. That is what this Article tries to aim at, and hope can provoke responses. So, the person, her life and authors are first thing we should know, and then her ideas of what is IPE subject. Of Course, her theories, which are Structural Power Analysis, New Diplomacy and what is hegemony and who¡¦s duty in International Society, is what the main point of this article. I regard the three main concepts of her theories are risks, structures and Values. So, this article also develop by ¡§Risk Occur¡¨ ¡÷ ¡§Structures Change¡¨ ¡÷ ¡§Values Change¡¨ ¡÷ ¡§Risk Occur¡¨.