Affiliated service provision method

When a plurality of services are enjoyed by a single terminal, a communication regulation caused by another service has influence on enjoyment of another service. A service provider and a mobile communication provider are affiliated with each other and newly provide an affiliated service in which a communication fee for a service use is borne by the service provider to a user. Conventional communication and affiliated service communication are performed on a single communication line of the user together, and communication control is performed in units of services such that a service quality of the affiliated service is maintained. It is implemented by affiliating a communication log and contract information between business operators and performing communication identification using user information at the time of a contract as a key.