In the face of the increasing demand for cold chain market,this paper designs and develops a cold chain monitoring system to solve the problems of lack of unified data system support,poor real-time performance,disconnection in supervision,inability to issue warnings,and high loss rate in cold chain logistics management in China at present.The system utilizes sensing technology to collect GPS and temperature and humidity information,and transmits the collected data to ThingsCloud cloud platform via MQTT communication protocol.Through the cloud platform,it realizes data interaction between multiple onboard gateways and the central monitoring end,effectively tracks and monitors cold storage vehicles,and creates a new intelligent management and control mode for cold chain logistics by scientifically managing and utilizing cold storage vehicle resources.