Efficiency is a concept that, although it is connected with economic and management fields, but due to its stronger connection with the concept of power, it also has clear and important examples in political science. The efficiency of political systems is the main factor of their stability and resilience, and the key factor for governments to overcome political crises around them. When a political structure collapses, the first step of that system is a set of inefficiencies, and the main cause of its downfall, before any other factor, is this issue. The collapse of the Pahlavi regime is one of the interesting subjects that can be studied from this point of view and the political crises of this era can be analyzed from this angle. In this article, an attempt will be made to obtain reliable indicators for evaluating the efficiency of the government and the political system in the Pahlavi era, with the help of systems theory, within the framework of structural-functional approaches, and the six capacities. The one that has been mentioned in order to measure the efficiency of the governments (monopoly on the use of force, extractive, shaping the national identity, regulatory, maintaining internal cohesion and redistribution) adapted it to the political structure of this era. And finally, he analyzed the fall of the Pahlavi government according to the results of this comparison.