With the upgrading of the body cams and the increasingly powerful functions, the application fields are no longer limited to the public security, the procuratorate, the court, transportation, fire protection, urban management, drug administration, customs, railway and other law enforcement departments, and the popularity and the quantity in non law enforcement fields have also continued to increase, including insurance, service, power, logistics, forestry, construction, manufacturing, mining industry and other civilian fields. Therefore, the application fields of intelligent body cams will be increasingly extensive and the market capacity will be much larger.