To restore a damaged noncontact IC tag to its non-damaged state; to make inputting operation required at the time of entrance to an event hall unnecessary and improve the reliability and convenience of an entrance management system.

A user 1 inserts a USB memory 40, in which an RFID tag, a noncontact tag, is incorporated, into a PC 10, and the insertion is recognized, and then connection to a dedicated site 3 is guided (Procedure [1]). The user 1 purchases a concert ticket on the dedicated site 3 (Procedure [2]), and the voucher is stored in the USB memory 40 (Procedure [3]). The purchaser information at the time of the purchase is transmitted to a hall terminal 20 in the event hall 2 from the dedicated server 30 of the dedicated site 3 (Procedure [4]). When the user 1 goes to the event hall 2 carrying the USB memory 40, entrance through a gate is allowed by collating the voucher stored in the USB memory 40 with the purchaser information transmitted to the hall terminal 20 (Procedure [5]).