The invention enables to readily download device control software to control device.Once receiving a request from a client PC through a HTTP communication module 10, a printer PT identifies an OS used by the client PC from an environment variable attached to the request through an OS identification module 11. A driver location search module 11 searches a location address of a printer driver corresponding to the identified OS from a driver location database 12. A HTML generation module 14 generates a Web page in which a link to this location address is described and then informs the client PC of it as response via the HTTP communication module 10.