In recent years, with the fast- growing of computer and 3G network technology, the Internet of Things (IOT) becomes increasingly mature and has been quickly applied to various fields of agricultural production, scientific research etc. The technology of IOT applied to the field of agriculture effectively romoted the transformation of aditional agriculture to modern agriculture. The forming process of the concept of IOT was reviewed. Research progress of IOT in facility agriculture, crop pest remote diagnosis, precision irrigation and farmland environment monitoring were summarized in this paper, and the application status of four aspects of IOT was also discussed. Some main problems to be solved in the development of agricultural IOT in China were analyzed and the corresponding measures were put forward. Finally, the development prospects of agricultural IOT in China were forecasted and agricultural IOT was highlighted as the future development direction of agriculture in China.