Along with the victory of Islamic Revolution, a fundamental change has occurred in Iran's foreign policy. But neglecting the domain of foreign policy and international relations in the study of the role of political system domain, confront the foreign policy study domain of Islamic Republic Of Iran with special difficulties that in fact leads to the weakness in conceptualization in this domain. With regard to the area of foreign policy analysis and the achievements of this sub-domain, this article aims to answer these basic questions that: what is the Islamic Republic of Iran’s foreign policy decision-making model? Answering this question requires considering different effective levels in the analysis of foreign policy that the present study, examines this subject in three levels of decision-maker, decisionmaking structure and decision-making orientation of foreign policy as main effective elements in foreign policy decision-making and their role in foreign policy decision-making, hoping that it can illustrate the action and decision-making logic and also effective structural and organizational factors affecting on the Islamic republic of iran’s foreign policy.