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根据互补理论得出了中国科学院珠穆朗玛大气与环境综合观测研究站(珠峰站)的蒸发皿蒸发量和实际蒸散发量之间的关系,结果显示,湿季(7-10月)的ε值(即使潜在蒸发量增加的那部分感热的比例)小于全年的ε值,干季(1-6月,11-12月)的ε值最大.其次,对珠峰站的实际蒸散发量进行了计算,结果显示,在湿季应用互补理论计算得到的实际蒸散发量更加接近于观测值,而干季实际蒸散发量的计算值与观测值的差距比较大.最后,通过研究珠峰站蒸发皿蒸发量和实际蒸散发量分别与风速、气温、相对湿度、净辐射以及降水之间的关系,发现由于蒸发皿蒸发量在干季主要受风速和温度影响,受相对湿度影响比较小,进而随湿度指数没有明显的变化,所以在干季应用互补理论计算得到的实际蒸散发量与观测值的差距比较大.所以互补理论可能比较适用于湿季,在于季并不适用.“,”This paper analyzed the relationship between the pan evaporation and actual evapotranspiration based on the complementary theory using observation data of Qomolangma Atmospheric and Environmental Observation and Research Station,Chinese Academy of Sciences (Qomolangma station) in the Qinghai-Xizang Plateau.The results show that,the value of ε in wet season (June to September) is less than that in the annual,the value of ε in dry season (January to May,October to December) is the maximum.Secondly,this paper estimated the actual evapotranspiration in the Qomolangma station.The results show that,the calculated actual evapotranspiration is more close to the observed value in wet season,and not close to the observed value in dry season.At last,pan evaporation are not greatly affected by relative humidity in dry season,which results that the calculatedactual evapotranspiration is not close to the observed value.So the complementary theory is more suitable for the wet season.