for achieving smooth facilities of services within a home network system where service applications of a plural number of service undertakes are mixed with , management is made upon a use memory volume for an application and an accessing authority to equipments within a home by means of a home gateway , and thereby achieving a home network for preventing an unexpected application from communicating with an unexpected equipment within a home , but without obstructing mutual services by the plural number of service undertakers , with setting up an upper limit of memory volume when starting up the application and the accessing authority from the application to the equipment within the home .