This study is performed by understanding the "zero" theory of soil erosion base level/point at first. Establishment of the lowest base level/point for soil and water conservation monitoring in a wide range of geography dimension and in a great time span is suggested according to the law of rock layer and soil under the external forces (water power

gravity and wind power

etc.)

namely the process moving from the high potential energy to the low potential energy. The theory helps to extend the scope of amendment to the Soil and Water Conservation Law

and reduce short-term and long-term soil erosion.