Abstract: The fresh agricultural products are easily rotted in the course of transportation because of the temperature,relative humidity and other reasons. It is necessary to improve the information degree of cold chain logistics of fresh agricultural products,so as to reduce the loss of fresh agricultural products during transportation,ensure the freshness of cold fresh and fresh agricultural products. Based on the special requirements of cold raw and fresh agricultural products for temperature and humidity,combined with advanced sensors and wireless transmission technology,a real-time monitoring system for cold chain logistics temperature and humidity of fresh agricultural products with ARM9 and ZigBee gateway as the core is designed in this paper.

Key words: ARM9, ZigBee, fresh agricultural products, cold chain logistics temperature and humidity, real-time monitoring system