A Radio Frequency IDentification (RFID) based tracking system becomes very important to the people's future world of pervasive computing, where information is all around them. Location finding is one of the most needed information for emerging and future applications. RFID tags may provide a new way of giving location information to mobile robot. Because of its small passive communication circuit and without an energy source, RFID tags can be embedded almost anywhere with any object. The Ultra High Frequency (UHF) RFID tags can stores location information which supply to any reader that is within a proximity range which can be up to approximately 15 meters.