Abstract: A monitoring system based on GPS and GPRS is designed to solve the lack of monitoring information or poor regulation in cold chain logistics.The system consists of a vehicle terminal and a remote monitoring terminal.The vehicle terminal collects the information of vehicle location,temperature and humidity and sends the data via the network of GPRS to the remote monitoring terminal which displays the location of vehicle according to the data of longitude and latitude.The tests show that the error of temperature and humidity is less than 5% and the error of location information from GPS is less than 50 m,which meets the design requirements.

Key words: cold chain logistics;GPS/GPRS;monitoring system