The central kitchen cold storage has a broader concept since specific cold storage can have multiple functions. Based on the temperature, it is usually divided into room-temperature cold storage, refrigerated cold storage and freezer cold storage. Based on catering purposes, it is divided into central distribution center cold storage, operations room cold storage, transportation room cold storage, garbage cold storage, etc. And based on the operational use of the central kitchen cold storage, it is further divided into operations room quick-freezing cold storage, which is mostly used for processing of certain quick-frozen food. The temperature of the operations room quick-freezing cold storage or storage-type quick-freezing cold storage is usually below -18 compared to the average of -25~-35.