Abstract: Web services composition need to aggregate adequate meta services to meet the service request. In SOA, the task to find these services is commonly fulfiled by the service requestor, but this method does not take into account the wish of service provider, who want to promote the sale of its services. To this end, an active service aggregation frame-work of Web service composition-oriented was proposed, which introduce Agent as a Web Service proxy. By Agent,services can be packaged into abstract entities which are able to find service requests actively. Through the "Intention-Behavior-Achievement" mechanism, the service capabilities and the service requests arc metched. Finally, in order to verify the feasibility of the method, the performance of aggregation framework was analyzed and discussed by several sets of experimental data on a simulation program.

Key words: Service agent, Intention, Behavior, Achievement, Aggregation