Iran's strategic position has attracted significant world powers, especially the United States, so the U.S. Central Intelligence Agency (CIA) has continuously monitored Iran's political and social situation. After the Islamic Revolution in Iran, the U.S. sensitivity towards the colonial theory doubled, and consequently, the CIA's espionage and interference in Iran increased. Such a situation was unbearable for Iranians who had a bitter experience of U.S. intervention in their country. Therefore, they considered a visa for the fugitive Shah by the United States as another betrayal. In return for fulfilling their demands, they seized the U.S. embassy in Tehran. With a descriptive-analytical manner, the present study aimed to answer ‘how well the CIA has worked at the U.S. Embassy in resolving the hostage crisis?’ Based on the results, with the hypothesis of CIA formal but covert intervention in Iran at the beginning of the Islamic Revolution and extensive efforts to resolve the U.S. government crisis, the CIA used its espionage process U.S. embassy after the Islamic Revolution with various tools. After capturing the embassy, they carried out many activities, including communicating with Iranian officials, mental espionage, communicating with Islamic movements, using local militias, and sending CIA officers to Iran to free the hostages. Define all these cases in the collection of maintaining colonialism and domination over Iran.
