A storage unit stores management information including information indicative of a correspondence relation between a plurality of devices and a plurality of peripheral devices and information indicative of a correspondence relation between identification information assigned to a peripheral device by a device and a position of the peripheral device. Upon receipt, from the device, of a notification that identification information of any peripheral device has been changed, a computation unit updates the management information in accordance with the content of the change. Upon acquisition of identification information of a target peripheral device from any device when the device outputs a log regarding the peripheral device, the computation unit provides the device with information indicative of a position of the peripheral device with reference to the management information.