DOOR MANAGEMENT SYSTEM

PROBLEM TO BE SOLVED: To provide a door management system for easily updating the identification information of an opening and closing identifying medium. SOLUTION: A reader/writer 2 performs non-contact read-out of information written in each card 1a-1c by using an electromagnetic wave. When the reader/ writer 2 reads identification information written in an ID card 1a, a control part 4 compares this identification information with identification information preliminarily stored in a memory 3, and when the identification read by the reader/writer 2 is registered in the memory 3, the control part 4 outputs a control signal to an automatic door control part 5, which opens an automatic door. Also, when the reader/writer 2 reads the information of a registration card 1b, the control part 4 moves this modes to a registration mode for storing the identification information of the ID card 1a in the memory 3, and when the reader/writer 2 reads the information of a deletion card 1c, the control part 4 eliminates the identification information of the memory 3.