Based on cloud+smart devices, Fahua Education has developed a big data system for teachers and students' safety and health information, which helps schools to establish a three-dimensional epidemic prevention and control system, comprehensively control the development of the epidemic, and build a solid campus security defense line. The big data system of safety and health information for teachers and students in Fahua takes human body temperature, facial features and witness information as the basis for judging access rights, so as to achieve the purpose of temperature control and quick access for personnel. The big data system of safety and health information for teachers and students in Fahua takes human body temperature, facial features and witness information as the basis for judging access rights, so as to achieve the purpose of temperature control and quick access for personnel. In the system, teachers and students punch in their health cards every day, report their body temperatures, establish safety and health files for teachers and students, fully grasp the health status of teachers and students, and timely understand abnormal information.