With the observation data of the automatic weather stations at 5200 m asl, 5600 m asl, 5800 m asl, 6000 m asl and 7028 m asl during May 5-June 4 in 2007， the average diurnal changes of some meteorological e1ements were studied， such as air temperature， humidity， wind direction and speed， and atmospheric pressure, and the distributing differences in various altitude meteorological e1ements were discussed. The causes for the special distribution of each altitude meteorological e1ement on the northern slope of Mountain Qomolangma can be attributed to the distributing differences in substrate characters, the environment of topography, land and water distribution and solar radiation. The observation data and historical corresponding data were contrastively analyzed, and the existing differences between historical data and present data were explored. It can provide some scientific bases for entirely understanding the characters of meteorological e1ements at the Mountain Qomolangma， for exploring the mountain environment， for mountaineering and scientific research of Mountain Qomolangma.