This standard specifies the general principles of radiation accident emergency monitoring, on-site monitoring, sampling analysis, safety protection, quality assurance, data processing and monitoring reporting and other technical requirements. This standard applies to the emergency monitoring of radiation accidents caused by the utilization of nuclear technology, the transportation of radioactive materials, and radioactive waste treatment, storage and disposal facilities or activities. Environmental radioactive pollution incidents involving the development and utilization of uranium (thorium) mines and associated radioactive mines, environmental radioactive pollution incidents caused by the crash of domestic and foreign spacecraft in our country, and overseas nuclear and radiation accidents and incidents that may have a radiation impact on our country's environment The emergency monitoring work can be implemented as a reference.