Current solutions on web services selection based on preferences mainly consider single user’s preferences

moreover

most of them are quantitative methods.However

many users propose different preferences on QoS attributes of web services in real applications.On the other hand

in many domains it is desirable to assess such preferences in a qualitative rather than quantitative way.This paper focuses on QoS-based qualitative service selection according to multi users’ preferences.We propose an algorithm based on CP-net.The algorithm can deal with Web service selection in terms of multi users’ preferences.Experimental results indicate that this method can obtain an optimal outcome which closely satisfies most users’ preferences and show the performance of the method.