The Accelerator Driven System(ADS)consists of a high power proton accelerator,a high power heavy metal target,and a sub-critical fast reactor.The availability of the accelerator as high as more than 0.9 is one of the most critical issues in ADS.The superconducting resonators have very high Quality factor.That means the slight change of resonator will cause the big shift of frequency which is one of the mean sources of beam trips of the superconducting linear accelerator.From the operation of CAFe,it is investigated that high stability,low cost,and maintainability are the main characteristics of Superconducting RF resonators for ADS.