Food processing is divided into clean operation area, quasi-clean operation area and general operation area. Food processing area refers to the places where food is roughly processed, cut, cooked and prepared, special rooms, food warehouses, tableware cleaning and disinfection and cleaning places.

Clean operation area refers to the processing and production area that requires high cleanliness in order to prevent food from being contaminated, including special rooms and special operation areas. Quasi-clean working area refers to the area where raw materials or semi-finished products after rough machining and cutting are hot-processed. Tableware cleaning area refers to the area where tableware after cleaning and disinfection and containers and tools in direct contact with food are stored. General operation area refers to other areas where food and tableware are handled, including rough machining area, cutting and matching area, tableware cleaning and disinfection area and food warehouse.