In a device information management system in which a management server for managing device information and various devices are connected, a plurality of different types of device information is transmitted to the management server at predetermined timings, respectively. In a device information management system in which a management server for managing device information and various devices are connected, a request to transmit the device information to the management server is transmitted to another device and the device information of the requesting device is transmitted to the management server in accordance with the request.