The Bangong Co-Nujiang River Plate Juncture in Tibet has complicated geological structure and favorable metallogenic conditions, and serves as a large potential ore-forming belt of precious metal resources. However, due to very insufficient geological exploration work and low level of metallogenic regularity study, no valuable primary gold deposits have yet been found. Based on a study of placer and primary gold ore spots, geochemical anomalies and placer mineral anomalies in the belt, in combination with an analysis of the ore-control factors, the authors advanced two remote sensing prospecting models for primary gold ore deposits, whose verification led to the discovery of a gold area with great reserves. The alteration rock type and the Mulongtao type recognized by the authors are two most important types of primary gold ore deposits in the belt, which show great potentials in the prospecting for gold deposits.