By well defining API, the network convergenceoriented open service platform can open the functions of network to various service applications, which make the service layer is independent from lower layers of network. In this paper, we describe the based architecture model of network convergence-oriented open service platform as six parts: service logic execution environment subsystem, service creation environment subsystem, service management environment subsystem, virtual home environment subsystem, service capability subsystem, network protocol adaptive subsystem. With this architecture, we can use the open API to develop more service without knowing the lower communication mechanism, which will make the network resource used more reasonable.