Abstract: For the problem of long-term storage equipment reliability evaluation, the paper puts forward an assessment method using regular test data. The method is designed based on a replacement timing interval test pattern. In this method, according to the performance index, the equipment is decomposed into multiple independent serially related components. Firstly, each component is corresponding to a set of indicators, the equipment regularly tested can be regarded as components regular tested simultaneously. Secondly, each component reliability is evaluated using the test sample failure likelihood function, which is created based on replacement timing interval test, and then the equipment reliability evaluation is completed. Equipment regular test data reflect the performance changing process of every component of equipment, the reliability evaluation result using the data has certain credibility.