This paper established a model based on the 3S technology, including the grid snowmelt model based on the energy balance, the grid flow model based on the water volume balance as well as the distributed grid runoff model, thus has formed a completely, with explicit physical conception, distributed snowmelt runoff model which Could apply to the actual service, and has carried it on the application and the confirmation in the typical basin. We had extracted basin information based on the highly resolution DEM...