Abstract: With speedy development of Web service, the function of similar Web service in abundance has been more and more issued to Internet In order to filter out the Web service needed by requester from the set of Web service, the paper explored a sort of selection mechanism of Web service based on the fusion of QoS and reliability. Aimed at the similar complexity of Web function, it made the anatomy of existent limitation in the current selection mechanism. I3y means of integrated estimation of service reliability, and through the monitoring data of service quality in third side, it evaluated the Web service selection from two aspects in su均ectivity and o均ectivity factors,and based on the model of QoS monitoring, target consumption group, service quality estimation and evaluation feedback, it finally proposed the model of Web service selection. The paper took case to make the simulation, and validated that the mechanism not only could adapt dynamic varying environment, but also could ensure the actual service quality, and overcame the individual difference of evaluation. hhc research results show that the proposed method of service selection is feasible and practicable.

Key words: Web service, Service quality, Selection model, Service selection mechanism