Method, device and system for realizing application service

The invention provides a method, a device and a system for realizing an application service, wherein the system comprises a terminal application support platform, a service capability management and control platform and a developer community, wherein the terminal application support platform is used for sending an authorization application for opening a value added service capability to the service capability management and control platform; the service capability management and control platform is used for returning authorization information to the terminal application support platform according to the authorization application and also used for recording the authorization state of the value added service capability according to the authorization information, adding the value added service capability into a callable capability set and sending a transferring interface of the value added capability to the developer community according to the authorization state of the value added service capability; and the developer community is used for generating an application service according to the transferring interface. The invention ensures that the terminal can simultaneously transfer the service capability of a telecommunication service.