A fuzzy factor set is constructed in the paper on the base of an appraisal index system by which banks appraise enterpries′ credit qualities both before and after their official sanctioning loans to enterprises in the course of credit management

and its corresponding single factor appraisal set is structured by means of an expert evaluation approach. Then the weights of single factors are determined in virtue of a statistical weighted approach and an auxiliary example is used to show how to apply the fuzzy overall appraisal decision-making model to the categorization of credit risks so as to attain its quantification and accuracy. Finlly

its technical analysis as well as retrospect is deeply made as to the application of the model.