The research of the radiation budget is valuable to reveal the hydrothermal conditions of the modern glacier's development and the interaction between glacier and climate, especially in the regions where the observational data are limit. annual and mean diurnal Variations of the components of radiation are analyzed based on observed meteorological data during October 20, 2008 and October 19, 2009, at an elevation of 5 040 meters of the Laohugou No.12 glacier in the Qilian Mountains. The results are obtained as follows: monthly mean values of air temperature are higher than the surface temperature of glacier, and the atmosphere is the heat source of sensible heat flux on the glacier. The total annual value of the incoming shortwave radiation is 6 937.9 MJ/m² in the region of Laohugou under the action of its high altitude, cloud and terrain. there are 21 days when the value of incoming shortwave radiation is larger than the Solar Constant, and the maximum is 1 675 W/m². Mean diurnal variations of the incoming and reflected shortwave radiation have a single peak curve, and the discrepancy of radiation intensity between spring and summer is feeble, and the smallest in winter. Mean diurnal of the incoming and outgoing long wave radiation appear single kurtosis and single vale, and the radiation intensity appears to be the largest(smallest) in summer(winter), and the discrepancy between spring and fall is feeble. The albedo of autumn and winter are higher than the spring and summer, and the annual average value is 0.74. Diurnal variations of the net radiation have an apparent seasonal change in the daytime. Except the period of from April to August, the net radiation is negative. The output of the radiation on the surface of the glacier exceeds the input during the year.