Aiming at many defects of SOA in constructing business processing, information transforming and messages communicating, a new semantic services-oriented architecture (SSOA) is presented by fusing the technological advantage of semantic Web and Web services. Using WSDL-S as bridge of Web services interaction, the architecture can efficiently implement semantic-based interoperation, share and integration in Web services. Adopting task-driven message mechanism to connect these components and work in terms of collaboration, it is convenient for distributed deployment of its components on Web. Finally, the working principle of SSOA and dynamic executable semantic are discussed and the feasibility is testified by a practical sample.