In February 2000, U.S.A worked out the strategy of National Nanometre Technology (NT), which evoked worldwide repercussions . Japan and Europe also successively worked out their development program of NT. As a new forward branch of science , NT will become a core driving force of causing a new round of material revolution in the 21 st century and exert an immense influence on the field of aerospace. This paper simply introduces the definition of NT, nanometre materials, and the research and development status of NT.