—Web service is subject to frequent changes during its lifecycle. Web service evolution is a widely discussed topic. Many related problems have also been generated from Web service evolution such as Web service adaptation, Web service versioning and Web service change management. To treat with these issues efficiently, a complete evolution model for Web service should be built. In this paper, we introduce our change-centric model for Web service evolution and how we use it to design, execute, and adapt to the changes during Web service evolution.