According to the field expedition and statistical data, there are 437 glaciers, covering the total area of 1552. 39 km² with the ice storage of 162. 8349 km³ in the Hoh Xil re-gion, Qinghai Province, being important water supply sources to the river and lakes in the region. Development of glaciers in this region is clearly affected by the climatic and topo-graphical conditions. Statistical data show that 61.8% of the total glacial number and 85. 5% of the total glacial area with 91. 4% of the total ice storage concentrates in the high mountain areas 6 000 m a. s. 1.. The equilibrium line elevation (ELE) of glaciers is de-creasing with the latitude increasing, average lowering 125m/1. Otherwise, the ELE in-creases from the east to the west in each mountain range, which is coincident with the de-crease in precipitation from east to west, reflecting the vapour in the air coming from the southwest monsoon through the path of southeastern Xizang (Tibet). Besides the precipi-tation caused by the monsoon transporting vapour, the precipitation caused by the local circulation is quite important supply source to the glacial development in the interior mountains. The geomorphological feature of the lake basins alternating with the mountain ranges in the Hoh Xil region is of benefit to the local circulation. In recent period, all of glaciers are retreating with the climate warming.