The concern for climate change has increased worldwide. Localized rain storms with high intensity and short duration have been observed in Asia. South Korea is one of the countries that have also been impacted by extreme rainfall events during typhoons. Extreme rainstorms have caused major damage from landslides and debris flows in the South Korean mountains. Korea is also experiencing changes in climate parameters, including annual temperature and precipitation. In this research, a physically based slope stability model for shallow landslide is presented. A model for the prediction of both topographic and climatic control on shallow landslide initiation processes in hilly mountainous terrain is proposed. We applied two simple hydrological models, coupled with the infinite slope stability analysis, to the July 2011 landslide event in Yongin, South Korea. The rainfall predicted to cause instability in each topographic element is characterized by duration and frequency of occurrence. The results obtained from the QD-SLaM has been compared with those obtained by the steady-state model, SHALSTAB. A GIS-based landslide inventory map of 109 landslide locations was prepared using data from previous reports, aerial photographic interpretation, and extensive field work. And this inventory of landslide scars was used to document sites of instability and to provide a test of model performance by comparing observed landslide locations with model predictions. This result demonstrate the QD-SLaM was successful in identifying the unstable areas under return critical rainfall than the SHALSTAB was.