Cold chain logistics guarantees the quality and freshness of some especial agriculture products. At present cold chain logistics monitoring system can just monitor single point of the temperature in the cold chain vehicle body, it cannot estimate the space temperature distribution of cold chain vehicle body. This paper introduces a cold chain logistics monitoring system based on ARM Linux. The data of temperature value in the cold chain vehicle body and the geographic location of cold chain vehicle will be monitored in real time. This paper presents a space temperature modeling method based on mutli-point temperature value to estimate the space temperature distribution of cold chain vehicle body.