Abstract: The Fuzzy Comprehensive Adjudgment (FCA) model is a mathematical model that is designed to evaluate a particular event by using the theory and methods of fuzzy mathematics and through a comprehensive adjudgment of weights of several controlling factors. Take the Huize Pb-Zn deposit for example, ore-controlling strata, structures and lithologies are selected as the fuzzy evaluation factor set to construct a FCA model, and its software realization is done through the computer programming. Based on experiments of adjudging the tectono-geochemical data, the prognosis of concealed orebodies has been made. The results show that the mineralization anomalies controlled by multiple factors are in accord with what drilling has revealed. The FCA model has common significance, and it can be used to evaluate events controlled by multiple factors in fields of geology, ecology, environment, meteorology, agriculture and economy.