The major advances in the researches on the influences of the snow cover over the Tibetan Plateau on weather and climate are summarized. It is recognized that more snow will lead to weaker or later Asian summer monsoon, which is realized through snowmonsoon interaction. As for the relative significance of albedo and melted snow water, there is no, by now, consistent opinion. As an important landsurface forcing factor, snow cover has close relation with the factors of subtropic high, blocking, winter and summer monsoons, ENSO, sea surface temperature, etc. It has great significance that the snow cover over the Tibetan Plateau increases on the background of global warming. Studies on the interdecadal variations of snow over Tibetan Plateau will help understand the causes of the fact “flooding in South China and drought in North China", and also contribute to the improvement of precipitation forecast.