Abstract : The Radio Frequency Identification (RFID) tags are important in wide field of life especially military, libraries, supply chains, cars security systems applications. It presents one of greatest identification tools and hav been used to cover a great identification issues. Thus, due to this importance the RFID tags in libraries are investigated in the present work using Libraries are a fast growing application of RFID; the technology promises to relieve repetitive strain injury, speed patron self-checkout, and make possible comprehensive inventory. Unlike supply chain RFID, library RFID requires item-level tagging, thereby raising immediate patron privacy issues. The results are obtained with the aid of SQL Server 7.0 and Visual basic 6.0. They made a database application connected to the RFID tags and sensors to verify a Client/Server scheme used in RFID libraries.