Abstract: A review of advances in the rmnitoring method of evapotranspiration(ET) by the rermte sensing data and its applicanon in river water resource management is presented in this paper.Cbmpared to the traditional field work,the method has the characteristics of better economic rationality and practicability.The estimated ET based on the remote sensing is not only useful for evaluating agricultural water's use efficiency and irrigated system performance,but also helpful for managing river water rsource and planning regional water resource utilization.With the development of information technology,the rmnitoring method of ET by the rermte sensing shows a bright future in water management and is a valuable technology worthy of being researched further and applied wndely in China.