In order to adapt to the development of agrometeorological modernization and the change of observation mode from manual observation to automatic observation, an automatic agrometeorological observation system based on AM335X is designed. The system is based on the Ubuntu embedded development platform, and is designed from two aspects of hardware and software. The hardware part selects the CortexA8 core industrial control MCU, which is applied to the image information processing of agricultural observation elements, and uses the modular structure to enhance the hierarchical standards of hardware design. In the software part, the Thread multithread communication mechanism is used to build the C++ dynamic link library, and the FTP upload software WinSCP based on the SSH security protocol is used as the interaction tool between the test system and the PC. Based on the SecureCRT software simulation environment, considering the state of the output format, the simulation status debugging and FTP server outputting and uploading tests for the state file information and image file information of the observation system are carried out. The results show that the system can automatically conduct the collection and data uploading of crop element observations and realtime growth images and provide a technical reference for the application and popularization of the future agriculture meteorological observation automation.