Abstract: Semantic program transformation is the foundation of Semantic-Web-Service-oriented software design. Semantic program can't be executed and called by runtime environment until it passes the program transformation. There isn't,however,any effective semantic program transformation method. Aiming at this problem,this paper presented a Semanti}Web-Service-oriented semantic program transformation method which is based on semantic program language SPI.This method makes an effective transformation on semantic information such as semantic data type, semantic rule,semantic service, semantic flow and so on, which not only enhances the flexibility and robustness of servic}oriented program design, but also increases the flexibility and reusability of the business process.

Key words: Semantic Web service, Semantic program, Program transformation