中文摘要：

遥感技术能够提供大范围地表特征参数的特点使其在干旱区蒸散发研究中得到广泛的应用。介绍了遥感技术求取干旱区地表特征参数（地表反照率、冠层叶面积指数、地表温度）的方法,并对遥感估算干旱区的主要计算模型做了概括和分析,最后提出了估算过程中主要存在的问题和未来发展的方向。

英文摘要：

For gaining large-scale land surface characteristic parameters,remote sensing techniques have been widely used in the research of estimation of the evapotranspiration in arid regions.This paper introduces the methods of remote sensing technology providing surface characteristic parameters（surface albedo,leaf area index,surface temperature）,and summarizes the main evapotranspiration models used to estimate regional evapotranspiration in arid regions.At last puts forward some main problems in the estimation process and the future development direction.