Through analyzing the spectral characteristic of the MODIS visible bands,the methods of monitoring dust storm is putted forward by using MODIS visible bands data.Based on abundant informations of the MODIS visible bands,the distinguishing functions of different spectral features of varions surface information were construct as branches of decision tree.The some dust storm weather processes were timely monitored by using the decision tree.The monitoring results show that the methods are of valuable for practical use.