A network device which is connected to a network and provides an information processor on the network with a service, comprising: a network communication unit for communications over the network; a storage medium interface unit for connection with a storage medium into which data can be written; a parameter information storage unit for storing parameter information containing an address for specifying a logical position on the network; a parameter information file creation unit for creating a parameter information file which reflects the parameter information stored by the parameter information storage unit; an installer program storage unit for storing an installer program which executes setup to allow the information processor to use the service; and a storage medium write unit for writing the installer program stored in the installer program storage unit and the parameter information file created by the parameter information file creation unit into a storage medium connected to the storage medium interface unit; wherein: the installer program reads a network address contained in the parameter information file from the storage medium and executes the setup according to the read network address when the storage medium having the installer program and the parameter information file written therein is connected to the information processor.