Remote sensing information generally reflect the spectral characteristics of land surface environment which include vegetation, soil, surface water body. On the basis of researching the relationship between underground water and vegetation in arid area, the plentiful water-bearing areas underground have been defined by vegetation remote sensing information analysis. According to the regularity that the land surface water were mainly supplied by underground water, dynamic analysis of Bayanbulage lake area in this region were done by taking use of multi-temporal remote sensing information. This paper pointed out that Hujier lake was supplied by underground water of deep layer, the interpretation results have been testified by geophysical exploration and drilling. It can be a guide for seaching water in this region.