概述了对核科学技术发展及应用方向的认识，包括核技术与能源、核技术与医疗卫生、核分析技术、核辐射技术、宇航与航海核动力等5个方面，讨论了它们对国家可持续发展的意义。概括了核科学技术发展的三部曲及发展前景。

This paper summarizes the development and application directions of nuclear technology, including five aspects: nuclear technology and energy、nuclear technology and medicine,nuclear analysis technology,nuclear radiation technology,astronautics and voyage´s nuclear power,etc. The paper discusses the importance of them to sustainable development and generalizes the development trilogy of nuclear science and technology and its pros-pect.