A system for providing a service from a service-providing device to a client device is provided. The service-providing device includes a database, a registering unit, a providing unit, a service end judging unit, and a service terminating unit. The client device includes a usage registration unit, a setting information storing unit, a function executing unit, a detecting unit, and a re-registration unit. The re-registration unit reads out the setting information corresponding to the terminated service from the memory if the terminated service is detected by the detecting unit, and transmits the setting information along with the registration request signal to the service-providing device to make a usage registration for the terminated service. Devices, methods and computer-readable media having programs stored thereon are also provided for making a re-registration for a service which has been terminated by a service-providing device, without requiring a user to conduct an operation for re-registration.