The present article is a research of the doctoral dissertation in the field of Islamic philosophy and theology entitled The study of human power and authority from the perspective of Khajeh Nasir al-Din Tusi as a theologian and Mulla Sadra Shirazi as a philosopher, Which has been written with the aim of identifying and explaining the views of these two thinkers on human power and authority: 1) Definition of power and authority from the point of view of Khajeh Nasir and Mulla Sadra 2) The difference between power in man and God from the point of view of Khajeh Nasir and Mulla Sadra 3) The opinion of Neo-Sadraians (Sadra commentators) about human power and authority 4) Opening the way for philosophers and theologians regarding human power and authority 5) Explanation of the rule of the thing, which does not exist, does not exist A main hypothesis between Khajeh Nasir and Mulla Sadra's views on solving the problem of human power and authority is strategic differences and 4 sub-hypotheses that were confirmed in the treatise of all 5 hypotheses. The present study is a qualitative research, so its validity and reliability has been done through the correct and wise conduct of the research process, which is from subject selection to defense. First, the generalities of the research, theoretical foundations, background of the research, and then the hypotheses were explained and the research questions were answered. Finally, all six hypotheses were confirmed and six questions were answered.