In software engineering,performance test is in general testing performed to determine how a system performs in terms of responsiveness and stability under a particular workload.The object of performance test is divided to two group.One is benchmark,and the other is non-benchmark.As performance test needs significant input of software resowrces, hardware resources and corresponding input of management and maintenance,traditional performance test takes a measure of miniature simulation.But this kind of miniature simulation causes inadequate test,and brings with serious consequences.Based on cloud computing,with its promise of on-demand,low-cost software and hardware resource,we builded the large scale performance test service platform to provide test service that is on-demand and customized.