Soil is the basic natural resource for human being life. Farmland lessen,soil degeneration,soil sandiness,salinization and swampiness seriously threaten the existing of human being. In order to make our country achieve the goal of 400 kg grain per capita in this late century,it is necessary to develop energy-saving,high-benefit and sustainable agriculture. In other words,under the condition of limited resource,it is necessary to elaborate the soil potentiality of production,pay attention to the balance and harmonization of ecosystem,material cycle and various kinds of resources,increase agricultural output and keep this tendency stable. The practice has proved that soil science is very important in studing energy-saving, high-benefit and sustainable agriculture. So we should increase intension of investment,stress the key points and strengthen comprehensive study.