IC card door lock is making use of the IC card integrated circuit chips imported from German as a medium to open up the door. The chip inside the card is handled on with the 4442 encrypted chips of SIEMEN from Gernman.It is of high capability to defend the counterfeit, as well as great security and comparatively cheap cost. Therefore, it is the most widely used door locks with the most skilled technology. Because of the IC card capability of repetious using, the IC card door lock is adopted by the hotels that need to use the customer card repeatedly so as to decrease the using cost.