Agricultural Internet of Things (IoT) technology is an emerging technology to promote the intelligent development of modern agriculture, which has been widely used in every link of agricultural production. With the rapid development of information technologies such as new perception technology, information transmission technology, artificial intelligence, blockchain and other information technologies, the application of China’s agricultural IoT is facing new opportunities. New sensing technologies such as spectroscopy, spectral imaging, and machine vision provide new ideas for realizing fast, real-time, non-destructive sensing. The new communication technology represented by 5G, combined with information processing technologies such as multi-source information fusion, artificial intelligence, blockchain, edge computing, etc., makes the transmission and processing of information faster, safer and more reliable. This article deeply analyzed agricultural IoT technology from four core levels of perception, transmission, processing, and application. Based on the new information technology system, the frontier trends of future research were explored, in order to provide some enlightenment for the innovation and development of agricultural IoT technology in China in the future.

Keywords： agricultural Internet of Things ; information perception ; information transmission ; information processing ; system application