The contemporary history of Iran is a history full of ups and downs and full of various intellectual, political, economic and social developments. Among them, it is important to examine the history of the Qajar rule and the Pahlavi regime due to their declines and proximity to the time of the Islamic Revolution. On the other hand, by examining the decline of both of them (the Qajar rule and the Pahlavi regime), it is possible to explain the effect of the Islamic Revolution on the decline of those declines. In the present treatise, the author has discussed and analyzed the "Islamic Revolution, the end of the decline of the country's history" with a descriptive-analytical method and a library approach, and the results of the research indicate that following the West was the theoretical basis of the Pahlavi government and regime. These foundations, the Qajar government and the Pahlavi regime, lost their political independence, but the theoretical foundations of the Islamic Revolution were Islamic values such as: beliefs, faith in the Almighty God and the authority of the Faqih, which are transcendental, gentrification, regulation and planning programs derived from this model.
)