There are three national reserves in Shaoguan,which has the richest nature resource in Guangdong province.Since ecotourism is important for the sustainable development of national reserve,it is necessary to make a quantitative analysis and evaluation of the ecotourism resource for these three national reserves.The traditional evaluation methods are incorporated with fuzzy mathematics to set up evaluation index system.After the comparsionof the nature landscape resource among the three national reserves,which are Chebaling,Nanling,and Danxiashan,an conclusion was drew based on three computing methods.The result shows that the evaluation of resource for Danxiashan is relatively low,Chebaling is better,and Nanling national reserve is the best.Some suggestions of sustainable development,such as constructing ecological networks,enhancing the construction of environment,and the participation of communities,are proposed on the result of evaluation.