In this achievement, Water consumption is monitored through surface evapotranspiration inverted by remote sensing technology, and the effect of water-saving irrigation is quantitatively evaluated. Meanwhile, crop yield is estimated by combining with crop growth monitoring and yield estimation technology. This technology can obtain evapotranspiration data with high spatial and temporal resolution, realize quantitative monitoring of the growth of main crops such as corn and wheat using remote sensing, and use time series vegetation index to classify crops, and obtain crop classification map and yield distribution in irrigated areas, which is suitable for monitoring of water-saving irrigation using remote sensing.