Through the statistical analysis of the 27 herbal prescription with the functions of nourishing“Yin”in“The doctrine of Epidemic Febrile Disease”found that sweet and cold herb,sour and sweet herb,salty and cold herb are widely used,reflecting the Prescription method of nourishing “Yin”from sweet and cold herb,sour and sweet herb,salty and cold herb.And reflect the characteristics of according to triple energizers Syndrome.sweet,bitter and cold herb are primary selected in upper-energizers.sweet,bitter and cold herb is primary elected in middle-energizers.Sweet,salty,sour,cold and average herb is primary elected in lower-energizers,to nourish Yin of liver and kidney,and take the Yin of lung and stomach into account.