Jiama copper polymetallic deposit is one of the large deposits that gained prospecting breakthrough in recent years in Gangdise metallogenic belt, w:st="on">w:st="on">Tibet. By comparing with typical SEDEX deposits, this paper means to point out the genetic type of Jiama deposit as porphyry-skarn type, related to porphyry metallogenesis. The porphyry system of Jiama hosts many different mineralization types owing to different wall rocks, including porphyry Mo-Cu deposits centered in intrusions, skarns, hornfels, and Au deposits in independent peripheral locations. Besides, an ore-prospection model is set up in this paper based on the magmatic-hydrothermal theory of metallogenesis to search for the areas in Nyainqentanglha region with geological conditions similar to Jiama deposit, and to find the Pb-Zn ores in shallow, peripheral parts of porphyry bodies and Cu-Mo-W ores in their deeper, central parts.