Intensive observations of some meteorological elements were made near the surface in Kokoshiri area at over 4500m elevation, Chin-Tang Plateau, China, in summer of 1994. The results obtained by analyzing the data are as follows: a) Strong solar radiation heats the ground and causes changeable weather and strong winds in the afternoon. b) The constant-flux layer of water vapor was not observed in the surface air layer when the soil surface was dry, although it was confirmed to be approximately developed when the soil surface was wet. c) Humidity inversion was observed over dry soil surfaces in the daytime. However, much more work is needed to clarify the cause or its mechanism.