Based on the three-layer system of IOT, this paper builds three child model of agricultural informationization, respectively for the agricultural information perception 、 information transmission and intelligent agriculture information processing model, three sub models with three layers structure of iot one-to-one correspondence, respectively responsible for information collection, transmission and the agriculture information intelligent processing. Managers can accurately grasp the field of real-time environmental index, so as to make a reasonable management of field with the right measures. By applying Internet of things in the agricultural informationization, greatly improve the automation and intelligence of agricultural production, and have a long-term and important significance to improve agricultural efficiency, increase farmers' income, the reasonable use of agricultural natural resources, protecting agricultural development environment.