There is monitoring. Company canteen installation monitoring play a monitoring role, especially in the cash register this position is to install monitoring, so as to prevent errors, the purpose is to make the back of the kitchen eye transparent, management information technology, scientific, scientific management of the company canteen has greatly helped. Catering is not mandatory must be installed to monitor the technical defense equipment, but those belonging to the mandatory public **** places such as hotels, schools, residential areas must be installed to monitor, and now the management requires all public **** places are installed to monitor the system is also out of the need for public **** security management.