Happening of Islamic Revolution has been counted as a turning point in the history of international relations. Proposing political Islam, IR has articulated its discourse of power and with its presence in the field, affected the discourses of power in regional and international area. Therefor the question of the paper follows as: how political Islam has affected the discourses of power in the two levels in the space of competition and conflict? Exactly considering the space of conflict and struggle ruling the discourses in international system and sub-system of the west of Asia, with regard to the time of IR happening in Iran and using the method of discourse analysis, we may draw and explain gradually ascending streamline of political Islam in the geometry of international power. Otherness-making of political Islam with both power discourses of Communism and Liberalism and, consequently, with their sub-discourses in the west of Asia caused a number of sub-discourses of the area to be fallen and destroyed.