The affinitive of human life need to understand the hydrologic cycle. It is necessary to be researched of this important cycle. The hydrologic cycle of Runoff constituted. However, study is a lack of research on relationship of runoff between soil moisture. WRF model is originally developed as a weather model estimated by atmospheric factors such as precipitation, eddy, and wind speed. It can be obtained atmospheric factors. In this study, We adopted WRF-ARW model in Korea of chengmi watershed and it is used measurement of soil moisture.