Abstract: In this paper, the research target of recent precision agriculture and its technical ideas in western countries were summarized at first, and then the similarities and difference between precision agriculture and agricultural eco engineering in China were compared. It is pointed out that agricultural eco engineering should draw on the experiences of precision agriculture on standardization and systematization of theory, modernization of research means, automation of process monitor and its regulation, application of high technology, intergration with information and mechanical engineering. Then a real precision agricultural ecosystem will be established to support construction of agricultural modernization and sustainable farming development based on the information, knowledge and ecological technical innovation.