Through an analysis of geological data of the Yangjiazhangzi and Lanjiagou Mo-polymetallic deposits, the main ore-control factors such as strata, magmatic rocks, structure and alteration were determined. Taking into account geological response to these ore-control factors in remote sensing images and making use of filter, ratio and other related methods, the authors extracted structure linear, alteration, and other information. Subsequently, an analysis of the weight of evidence and a test of independence (X2) of basic geological elements and information in remote images revealed that ore-control factors chosen are reasonable from mathematical and geological viewpoints. The above study led to the delineation of two new prospective areas.