In recent years web services has become prevalent and be looked as the best way in constructing distributed system over the Internet. Matchmaking is the key technique concerning web services because it is the foundation of doing service discovering and composition. The matchmaking of web services consists of the so called IOPE matchmaking. The capability information carried by IO is different from PE. The IO is the signature of the services while the PE is the actual capability description of the services. The technique used to describe and manipulate IO is different from PE. Previous work are mainly concentrate on the matchmaking of IO. The PE are still lack of means to deal with. In this paper we proposed a method based on Description Logic to resolve this problem. The main contribution about this method is the possibility of doing the whole semantic matchmaking just using one Description Logic reasoner.