Some works in the field of politics and political reflections at the heart of Islam and Iran appeared have been written with the goal to point out the proper behavior of the political life of all authorities or those who have role in power production, distribution and exertion. Historical documentations and evidence show that in order to dominate all affairs and control Saljuqid kings’ and willful and exceeding policy, and on the other hand, deal with the Ismailis, he managed to centralize Saljuqid power; in order to achieve this important, he even tries not to stipulate to caliphate and its other branches in his Siasat Nameh book. He even says nothing from the relationship between Caliph and Sultan and just sometimes, in general, he points to the Caliphs or he brings some examples of their characters to explain his issue of tips. Therefore, Khajeh devotes the entire book to the King and the monarchy institution, and its promotion.However, the question is "Didn’t the Khajeh’s actions of prosecution of centralized Saljuqid power policy, against his real goals lead to the institutionalization of absolute dictatorship system and appropriate space for Ismailis growth and development of their activities in Iran?”; answering this contradiction is the goal which in this article is tried to be analyzed using new approach that based on historical facts.