We studied on the effective evaluative method for the design and planning of water space. We arranged firstly the replies to the questionnaires by using the method of rank order on the aesthetic evaluation of water space including agricultural waterway, and then showed that the result was in agreement with it on the basis of the method of the Analytic Hierarchy Process (AHP). We found that the AHP method was able to deal with the subjective judgments systematically and it was more quantitative than the method of rank order. We also carried out a quantitative prediction for the estimation of water space by using a model of the Artificial Neural Networks (ANN). It was found that the ANN model was effective for the quantitative aesthetic evaluation of water space.