On the basis the diversity of evaluation index and boundary ambiguity of evaluation standard

this paper developed nonlinear correlation coefficient applied in CRITIC method to determine the weight of each single index which has clear physical meaning and maximizes the use of test data and information difference; then synthesize the skin condition index characteristics and the experience of experts by the fuzzy membership function; finally the evaluation grade of the skin condition would be achieved by the fuzzy matrix synthesis algorithm. The evaluation results of experiment and the experts in the field have a good consistency. It indicates the feasibility and effectiveness in reality of the proposed evaluation method.