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PHM is an important guarantee to improve the combat effectiveness of equipment. Concurrent testability design in equipment design stage is the main shortcoming of improving PHM capability. Verification and evaluation of PHM is an important step to establish the reliability of diagnostic and prognosis system. This paper presents the research status of testability design for PHM. Then, the validation method and technical framework of PHM indicators are analyzed. Later, the index system of PHM system verification is given. Finally, the paper points out the problems that should be paid attention to in the methods of fault prognostic and health management system verification and evaluation, and clarifies the development trend in the future.