There are always disputes with if political science / international relations theories has "scientificity". Since research scope of national government level is too large to be representated, international relations and diplomatic behavior research is mainly based on case studies of diplomatic history, system model, or psychological analysis. Therefore, whether it has the "scientific facor" -- including "universal, repeatability and predictability" ---- is a common cause of academic debate. This study attempts to manufacture experimental conditions in order to "simulating" approach, designed a player to play "deciders", who negotiates interact with each other, and writes interactive record as research datas. In the paper, author attempts to discuss the three sub-themes: firstly, the relationship between this simulation and theory, the possibility of the establishment of the methodology? Secondly, in the context of these simulations, whether it can confirm the theory of international relations? Thirdly, we also tried to discuss these scenarios and predictive modeling and restrictive, and trying to academic discussion, "Political Science / International Relations" as a discipline, which is its meta-theory.