Abstract: Abstract： This paper descripts the development of precision agriculture in the world, and introduces the application of precision agriculture in the modern installment agriculture of China. Precision agriculture has become a combination industry of high-tech and agricultural production in developed countries, which has been widely recognized as an important way for the development of sustainable agriculture. In the early 21st century, the irrigation technology of precision agriculture has been applied gradually in the installment agriculture of China, with developed drip irrigation, seep irrigation, micro spray irrigation, pulse irrigation, etc, and formed some water-saving irrigation techniques by crop physiology moderating, such as Regulated Deficit Irrigation (RDI), Alternate Irrigation on Root-Divided (ARDI) and Partial Root Drying (PRD). The precision irrigation monitor system has developed in the procedure of cultivation, and the practical application showed that the system could improve the utilization percentage of irrigation water from 45% in present level to 70% ~ 80%, water use efficiency increased to 2.0kg/m3, crop production increased 15% ~ 30%.