Qinghai Lake watershed is of special ecological functional area in northeastern Qinghai-Tibet plateau. Qinghai Lake is the largest salt water lake in China, is important for maintaining ecological security in the northeast of Qinghai-Tibet plateau waters, is a natural barrier to stop the spread of desertification in the West to the East, is the region's most important source of water vapor and climate regulator, while gene rich biodiversity and biological species are one of the important areas. Qinghai Lake ecological status is very important. This main Lake Lake in Qinghai Lake watershed hydrology and hydrologic elements of the control station over the sequence of observed data, statistical analysis of precipitation in Qinghai Lake basin, evaporation, runoff, sediment distribution, and interannual variation between years; Analysis of these statistics help to master the hydrological characteristics in the Qinghai Lake watershed of rivers into Lake, for local and on a watershed in terms of space, provide a basis for protection of Qinghai Lake ecological environment and natural resources, for research on soil and water loss in comprehensive management of law and a certain amount of scientific evidence.