Abstract:Prognostic and Health Management(PHM)system is the core maintenance support system on F-35,the new generation fighter of US air force,designed for reducing maintenance cost and resource requirements. This paper overviews the development of PHM technology,analyzes PHM architecture of F-35,including the functions of major modules,summarizes the procedure of PHM system,introduces current situation of PHM system of F-35 and major problems,puts forward some thinkings on the development of PHM,provides reference for researchers on PHM technology.