Abstract: A lot of people worry about that the terrorists will make nuclear terror to jeopardize people's wealthy and property to reach their terrorist goals for disturbing social system and beating economy by attacking nuclear facilities or dispersing radioactive materials after 9.11 incident. Many countries are taking active safety and security measures, reviewing and making emergency measures for anti-nuclear terror, and improving international cooperation to reduce the possibility of nuclear terrors. The possible way and aftereffect of nuclear terror made by dispersing radioactive material, avoiding nuclear material and radioactive material from stealing and buying non-legality, and providing emergency measures to deal with these nuclear terrors are introduced.