Natural disaster is one of the biggest problems that the current world has to face with. Its damage is beyond our imagination. It has great influence on the suitable development of economic and society; even it will threaten the survival of mankind. People have to pay attention on it. Recently, people have suffered lots from it. For example, Ya An earthquake, England flood, Chile seaquake and so on. All these natural disasters have caused serious tragedy, leading a plenty of people hurt or died. However, the cause of natural disaster is the behavior of human beings. Just like, mankind chop down tress and then causing the appearance of debris flow. If we make great effort on it, we can reduce these natural disasters. There will be more people be saved with less natural disaster. The International Day for Natural Disaster Reduction is aiming at proposing everyone stop doing the things that will cause natural disaster.