A network-connectable device is configured to communicate with one or more computer-related devices via a network. The network-connectable device includes a list management unit and a shutdown unit. When the list management unit receives a start command signal instructing an activation of the network-connectable device which is transmitted from a computer-related device, the list management unit registers the computer-related device on a list. When the computer-related device registered on the list is switched to or is to be switched to a disconnected state disconnected from the network-connectable device, the list management unit deletes the computer-related device from the list. The shutdown unit shuts down power to a part of the network-connectable device when none of the computer-related devices is registered on the list.