Abstract:The Prognostics and Health Management(PHM) technology has been widely recognized as an enabler for improving reliability,safety and affordability of new generation weapons systems and commercial products, achieving autonomic logistics and condition-based maintenance(CBM)/enhanced CBM(CBM+). European Countries and the USA have been promoting the development, maturing of PHM critical technologies and their applications in military and civil areas through various technology investment projects.Accordingly,NASA IVHM project ,European TATEM project and the WiTNESSS project including the background,research framework ,characteristics,management structure and development focuses,etc were briefly introduced in this paper.