The control system is the brain of the whole refrigeration system and cold storage, and it is no longer a simple control of temperature. The real control system should be composed of control system, monitoring system and management system. It can not only control the temperature, but also manage the whole cold storage and manage the cold storage accurately. The safe use of cold storage can not be separated from the precise management of cold storage, the management of fresh storage, the safe operation of management system equipment, and the management of energy consumption and electricity consumption of cold storage. The electronic control box of the Internet of Things solves the problem of cold storage management very well.