Progress on Drought Monitoring by Remote Sensing

In this paper, the work of drought monitoring by remote sensing done by domestic and foreign scholars is summarized.According to the different data of remote sensing, drought monitoring will be summarized five categories in abroad, namely presentation of the main methods and progress.Meanwhile, the domestic situation of drought monitoring by remote sensing are analyzed from space scales, time scales, monitoring tools and monitoring methods four aspects.And some problems in the practical application are discussed.