Abstract: China is one of the most widely distributed states of mountainous region in the world. Mountain hazards of the region such as flash flood, debris flow, landslide are very developed. With the development of the internet of things technology, mountain hazards monitoring and warning become an important application field of the internet of things technology. In this paper, based on the practice of mountain hazards monitoring and early warning, the urgency of the mountain hazards demand is expounded for the internet of things technology. The present situation of the internet of things technology is introduced in mountain hazards monitoring and early warning applications. At the same time, the authors proposes that the internet of things technology apply to mountain hazards monitoring and early warning need to solve problems and need to breakthrough key technologies.