Abstract:As the modern weaponry is becoming more complex, integrated and intelligent, the traditional fault diagnosis methods are difficult to meet the new needs. To economically and effectively meet the requirements of information war, such as the operational effectiveness of weaponry, and quick, accurate, continuous support, PHM (Prognosis and Health Management) emerged in the mid-1990s. In this paper, the applications and developments of PHM technology abroad are summarized from the aspects of general situation, application effects, PHM verification and evaluation, typical case analysis and development program. And we also make a summary in terms of the fundamental theory, engineering technologies, and applications of PHM technology in China. By comparing the current development and application situation of PHM technology in China and abroad, the gap between our development and international advanced level is analyzed, and the lessons and enlightenments for future developments are summarized.