A comprehensive model of pressure-state-response(PSR) has been used as the assessment index system to evaluate the eco-health extent of Hengshui Lake wetland in Hebei Province.Weber-Fechner(W-F) Law was applied in assessment eco-health of wetland,and value of wetland ecosystem health index,effect of ecosystem health index to wetland,the weight of index were taken as the intensity of the stimulus(c),the value(k) of human caused by environment represents and Weber constants(α) respectively.The evaluation reve...