Abstract: The northern segment of Mt Gaoligong serves as an extension of the Tibetan Plateau. Due to its high altitude, complex terrain, and difficulties in replenishment for monitoring teams, wildlife monitoring in this area is particularly weak. Therefore, it is necessary to conduct a fundamental survey of the bird and mammalian biodiversity in this region, to understand the status and spatial distribution patterns of its resources. Based on these findings, adjustments to corresponding survey monitoring and conservation management measures are deemed necessary. From May 2018 to November 2019, an investigation was conducted using infrared camera technology at different altitudes in western slope of the northern Mt.Gaoligong. The purpose is to further supplement diversity of bird and mammal in this area and analyze the distribution pattern of species diversity. A total of 22 mammal species belonging to 13 families and 6 orders, and 43 bird species belonging to 15 families and 4 orders were recorded. There are four national first-class protected wild animals: Asian Golden Cat (Catopuma temminckii), Himalayan Takin (Budorcas taxicolor), Dhole (Cuon alpinus) and (Lophophorus sclateri), and 22 national second-class protected animals such as Gongshan Muntjac (Muntiacus gongshanensis) and Mainland Leopard Cat (Prionailurus bengalensis). The results of relative abundance index showed that the most common mammal in this area was Pallas’s Squirrel (Callosciurus erylhraeus), and the most common bird was Blood Pheasant (Ithaginis cruentus). In low-altitude areas, the number of species is higher in spring and winter, whereas in mid-altitude and high-altitude regions, the peak species diversity occurs during summer. The Jaccard index calculation results indicate that the high-altitude zone (3500-4200 m) exhibits a more unique species composition compared to the mid-altitude (2700-3499 m) and low-altitude (2000-2699 m) zones. Mammalian diversity exhibits a unimodal distribution along the altitudinal gradient, whereas avian diversity peaks at both the (2500-3000 m) and (4000-4200 m) altitudes. The following suggestions are proposed: (1) Construct monitoring trails in high-altitude areas to facilitate routine patrols and regular species monitoring; (2) Establish monitoring stations to ensure long-term scientific research.