Sediment yield is characterized by many regional factors such as geology, geomorphology, climate and vegetation. The object of this study is to establish a method of surveying sediment yield process in a bare slope, and of analysis and evaluation of the characteristics of the slope. They clarified the characteristics of sediment yield: in particular that the erosion rate is affected by slope gradient, compressive strength of the bare slope, rainfall intensity and the freezing and thawing effect.