To provide a remote management system that can surely and accurately register identification information of a device to be remotely managed and identification information of a wireless slave unit of a wireless unit to a wireless master station or a data communication unit at the installation of the device to be remoteIy managed.

When the wireless master station 100 or a data communication unit 7 incorporating the station 100 of a wireless system forming wireless communication among the data communication unit 7 and image forming devices (devices to be remotely managed) 1-5 receives a device code (identification information) of the image forming devices 1-5 and a slave station ID (identification information of wireless slave units 101-105) from the wireless slave units 101-105, store each identification information to a 2nd management table in cross-reference with each other to update the management table, checks whether or no the information stored in the 2nd management table is correct, and stores the information to a 1st management table to update the management table when the information stored in the 2nd management table is recognized correct (no error).