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Model validation technology in fault prediction and health management (PHM) system is being developed in high priority, especially how to realize normative, systematic, generality and practicability in engineering applications, has become a technical problem that need to be solved. Based on the analysis of the state of the art at home and aboard, this paper did a systematic research on the PHM model verification process, including the fault data election method, and the diagnostic and prognostic performance metrics. Setting the on-board diagnostic model as an example, the model verification flow is described in detail, which has been used for the design, development, and implementation of the PHM verification platform with engineering characteristics. 