(1) Pre-employment health examination: master the health status of workers before employment and related basic data; Determine whether the health status of workers is suitable for a job.
(2) Regular health check: it is to check the health status of workers engaged in certain operations at regular intervals, with the purpose of finding early damage or suspicious signs of occupational harmful factors to workers' health in time and providing information for evaluating the production environment.
(3) General survey of occupational diseases: generally, people exposed to certain occupational harmful factors should undergo health examination to detect occupational disease patients and observation objects; At the same time, people with occupational contraindications can also be detected.