The issue of espionage in terms of extent; It has been placed in the bed of tremendous imaginations and developments and has found a linear presence in human societies in the form of an epidemic. Espionage is one of the issues whose importance is increasing day by day; Humans need information to do anything, and in fact, this information will open the way for them to do things. Therefore, the countries of the world are establishing spy systems in order to obtain more information, and to access it, they use extensive and advanced facilities, including satellites and electronic devices, and even interfere in the internal affairs of other countries. and change the policies of those countries for the benefit of their respective countries, therefore every society and especially the security organization; military, especially the police command of the Islamic Republic of Iran, to ward off the harm of this massive attack; It is necessary to choose methods to avoid the sting of this matter. Therefore, this article aims to familiarize with various methods; covers; the motivations and tools of espionage and its prevention strategies have been compiled.