Abstract: The method of reliability assessment and life prediction for zero-failure data of satellite engines is presented in the paper.Thus the one-sided lower confidence limits of reliability and life for zero-failure data can be calculated by the method.The reliability assessment and life prediction of the two-parameter Weibull and log-normal distributions are discussed at some length.The method for strong test and weak test of satellite engines are established,which can inspect and control the quality of satellite engines with a high precision.The method has been used in the reliability assessment and life prediction of some satellite engines successfully.