A method for performing service configuration on a terminal, comprises configuring service configuration codes and deploying one or more service configuration application servers in a next generation network in advance, said service configuration application server supporting said service configuration codes, and the method further comprises: a user terminal sending a session initiation protocol message to the network, and said session initiation protocol message carrying a service configuration code; after receiving said session initiation protocol message, the service configuration application server extracting said service configuration code, and performing corresponding service processing according to content of said service configuration code. A system for performing service setting with a terminal is also disclosed.