A system is provided for enabling a subscriber using a credit call service to utilize a telecommunication service subscribed by the subscriber himself or herself. The credit call service system is provided with a service switcher station for registering telecommunication service information for identifying the telecommunication service that each terminal subscribes, a service controller for registering the telecommunication service information of the telecommunication service that the subscriber who subscribes the credit call service subscribes by himself or herself, and a service information replacement unit for replacing the telecommunication service information registered in the service switcher station by the telecommunication service information registered in the service controller upon the receipt the credit call service request from the subscriber. As a result, the subscriber may receive the telecommunication service that the subscriber subscribed, irrespective of the telecommunication service that the used terminal subscribes.