One of the most important fundamental issues in the policy sphere is the discussion of the organization of the state and the regulation of the internal power relations of the state, in which the type of political system as well as the principle of separation of powers is very influential. Because according to the type of political system and the acceptance of one type of separation of powers, different ways of regulating the ruling powers such as the presidential, parliamentary and semi-presidential-semi-parliamentary system are raised, in which each country, the political system And they have designed a specific structure. In the Islamic Republic of Iran, the system of the Ummah and Imamate as a general framework for the realization of divine sovereignty and religious democracy and the level of regulation of the relations of power, the semi-presidential semi-parliamentary system has been determined. The main theme of this research is the analysis and political assessment of the change in the way the power relations are regulated within the framework of the Ummah Imamate system and the evaluation of the resulting effects. This paper uses the descriptive-analytical method to find the answer to the question of how the change in power relations, especially the executive branch, is evaluated and what works on it? The main findings of this research are that in changing the form of executive power assuming that there are no restrictions on the religious foundations except the necessity of maintaining the system of the Ummah and Imamate, there are, from a political point of view, in the Islamic Republic of Iran, The possibility of changing the form of the executive branch, especially the removal of the post of presidency, faces fundamental constraints, as the main symbol of the republican system is the president.