One of the services that crime investigation police gives to citizens, is finding the stolen cars. A number of new technologies have been design and implemented around the world to detect these cars. In Iran, as well, an “electronic police” has been designed to quickly track down the stolen vehicles having a digital license plate. The operation is in a way that it can track down any stolen car and assess its location and finally stop it by the police. In addition, it is possible to enter the stolen car information in the system and then the system will automatically detect the car when it intercepts the system receiver and identify it. In this article, another method based on the RFID, as an intelligent tracking system for stolen cars which has been designed in Iran University of science and technology, is introduced. These systems can be divided into to major parts: hardware and software. One of the unique features of traffic systems based on RFID is the possibility of tracing the cars anywhere within the intelligent network. The car information will be registered in the data bank as the reader reads the index. The information include: VIN, Reader’s antenna number, reader number, antenna location, time and date of reading. These information bring out the possibility of tracking down the stolen cars, tracing in security plans and recovering the car passages