摘要: This paper deals with the content, purpose and significance of digital agriculture, and gives a brief introduction to digital earth, digital China and digital agriculture abroad. The main content of digital agriculture includes the construction of database, Metadata standard, monitoring system, forecasting and decision-making system, information-releasing system. The main technical supports of digital agriculture are 3S technology, Metadata management technology, fast-handling technology of remote sensing, the technology of computer wide-band network and virtual reality, intelligent agriculture machinery and field real-time information collecting technology. The advantages of implementing digital agriculture in China and the problems worthy of attention are pointed out as well.