The Radiation Science Center is concerned with the radiation safety for the high energy accelerators, management work of more than 6000 radiation workers, radiation monitoring at the experimental places and boundary of the institute, and the chemical waste disposal safety in KEK. The Radiation Science Center promotes the research and development studies of radiation protection from the accelerators and environmental chemistry related to the accelerators. The Radiation Science Center plays a leading role in the radiation protection study and work for high energy accelerators in the world.