BILLING SYSTEM, BILLING DEVICE, DEVICE CONTROL METHOD, BILLING METHOD, AND BILLING PROGRAM

摘要

A rule transmission means (91) transmits a billing rule to a device (70). A ticket transmission means (81) transmits a ticket to the device (70). On the basis of the billing rule received from the rule management server (90) a ticket subtraction means (71) of the device (70) subtracts the user's tickets in accordance with the use of the device by the user. When the tickets of the user using the device run out, a ticket request means (72) requests an additional amount of tickets for the user from a ticket management server (80). When an additional amount of tickets cannot be obtained from the ticket management server (80) a control means (73) restricts the use of the device by the user.