Data delivery system and data delivery method

A data delivery system and method include storing software resources in a central equipment, receiving and storing software resources sent from the central equipment, and communicating with the central equipment, terminal devices and with the intermediate server. The central equipment includes a registration-accepting unit for accepting registration of software resources, a resource information storage unit for storing resource information having a version number corresponding to the software resources accepted by the registration-accepting unit, a resource transfer unit for sending the software resources accepted and the resource information stored in the resource information storage unit to the intermediate server, a server list-creating unit for creating a server list of the intermediate servers to be sent to the terminal devices, and a sending unit for sending the server list created by the server list-creating unit.