After the Iranian Mashrooté Revolution, the Shiite Political Thought Faced a new era of much attention, contemplation and explanation, when religious scholars embarked on a new research project to address the new situation. The most serious attempt to deal with the theoretical gap and crisis in Islamic state was contributed by Imam Khomaini. In his theory of state, he conjoined the Shiite principle of Imamate, the jurisprudence principle, and human law, which brought about radical changes in the socio-political structure of the Islamic society. This article is to study Imam Khomaini's perspctive on the Islamic state.