National science and technological planning is a basic form of science an d technology research activity organized nation -wide by the centra l government with objective,approa ches and measures.It is a basic tool t o enforce national science and technology policies,while plays a very imp ortant role in reflecting state voli tion,mending market deficiency,as well a s realizing appropriate science and technology resources allocation.B ased on the essential analysis method of national science and technology planni ng,this paper discusses the backgro und for the development of US ATP and its stra tegic orientation.It also analyzes the principle management model of US ATP and its impact on US economy.