Device control method, the home server device connected to the device management system and device management system

Equipment control method in device management system of the present disclosure, received from the information device via the external network, the device password for using the home server device is inputted in the information device using the setting screen, a device ID, a user and managed in association with the ID and device password, and transmits the device password to the home server device, is managed in association with the device ID and device password in the home server, if the login is authenticated, via the external network sending an authentication screen on the information device, the information device via the external network to receive the additional password entered in information devices using an authentication screen, additional password received is associated with the user ID device If it is the same as the password, to allow the operation of the target device by the information equipment.