According to the precision farming technology and theory, GPS and GIS technologies were used to investigating, collecting and managing the data of grassland resource. Base on the investigation data, the prescription maps were figured to show the content of the soil moisture content,soil bulk density,soil cone index,soil total nitrogen,soil total phosphorus,soil total potassium,soil organic matter,soil available nitrogen,soil available phosphorus and soil available potassium in the investigation area. The prescription maps showed it was feasible that the precision farming technology could be applied in grassland resource investigation and management, and the prescription maps showed that the content of total phosphorus was lack significantly on the investigation grassland.