Combined with the mineralization ages of the porphyry deposits in northern central Inner Mongolia and the adjacent Mongolia from the literature, the authors recognized four metallogenic episodes, i.e., Late Devonian, Early Permian, Triassic and Cretaceous. On the basis of the metallogenic evolution, the porphyry mineralization type is divided into the Late Devonian copper ore-forming stage in an arc tectonic setting and the Early Permian and subsequent molybdenum ore-forming stage in an extensional tectonic setting. The difference and evolution of mineralization types in geohistory indicate variation of tectonic setting. The data also provide great potential for exploration of molybdenum deposits hosted in the extensional setting.