Different branches of the military, serving in the military environment and the specific positions of different regions, working and living conditions are very different, the resulting incidence of the disease is also different. Servicemen particularity of the work is mainly reflected in three aspects: First, the task particularity, such as participation in international military operations, combat missions, military exercises, maintaining social stability, disaster relief, etc., the second is the particularity of jobs, such as work requires frequent exposure to toxic and hazardous substances in the marine soldiers, underground, underwater and radiation, health and other work of the military, three are regional particularities, such as frontier, islands, mountains, deserts and other remote areas difficult, harsh natural conditions, for military personnel stationed in the physical and mental damage than normal.