Abstract: With the development of Web service,service discovery becomes an important link between the service requestor and service provider,and the quality of service applications is directly affected by the performance of the service discovery mechanism.In order to provide high-quality Web services to the service requester,multi-constraints service mechanism based on ontology was presented,which selects the best service to meet the needs of the service requestor from a semantic perspective with multi-constraints,thus providing a more accurate service and improving the perfor-mance of the service applications.Finally,the experimental results demonstrate that the proposed multi-constraints service mechanism based on ontology effectively improves the accuracy and the quality of service system.

Key words: Ontology,Reasoning,Service discovery,Multi-constraints