RFID technology uses radio frequency signals through spatial coupling (electromagnetic induction or electromagnetic propagation) to achieve contactless transmission of information and exchange information with markers to achieve the purpose of identifying objects.

Nowadays, RFID technology has been widely used in various fields, such as Hotel, Access, Library, Parking, Shopping, Logistics, and Asset Management, etc. With the developed rapidly at an unprecedented speed, which has attracted the attention of many countries. At the same time, the research and development of RFID technology in access control management system has also become mature.

The access control system is an electronic automation system that uses modern electronics and information technology to control the entry / exit inside and outside the building, and the entry / exit of people (or objects), such as releasing, passing, rejecting, recording and alarming. The access control system installs control devices such as door magnets, electronically controlled locks or controllers, card readers at the entrances of important parts of the main management area in the building, and has management personnel to monitor in the central control room to be able to control each channel The position of the entrance, the passing object, the passing time, and the direction can be controlled in real time or programmed, so as to realized the security control of the entrance / exit.