Blockchain and trusted computing technology in the construction of smart agriculture system with modelling is studied in the paper. Intelligent agriculture is the highly comprehensive system engineering, and it is becoming a new trend of world agricultural development. It can be seen that intelligent agriculture is the best choice for low-consumption, high-efficiency, high-quality, environmental protection and intensification of agriculture. Unmanned aerial vehicle remote sensing platform as a new information acquisition method has also begun to be applied to precision agriculture, hence, this paper adopts the latest technologies to design the novel model with the robust framework. The blockchain and the trusted computing models are combined to serve for the data collection and processing units, the smart system is implemented with the IoT. Through the testing under different models, the designed framework is proven to be efficient.