Abstract: It is a simplified and layered model to describe seasonal change of a snow cover. The model will be used to couple with frozen soil model being developed later. In order to keep the model more accuracy as well to be able in using in GCM study, the model takes into consideration the energy and mass transpor tprocesses as well scheme of layering snow pack carefully. In the model, the internal energy, instead of temperature, is used as predicted variable. It will help us to deal with phase change process and to reduce computational error more efficiently.