Abstract: The medium-range oscillations over the Tibetan Plateau during 1979 were investigated nsing the OLR data. The results were compared with that obtained from the Meteorological Experiment(QXPMEX).The space distribution of longrange mean OLR depends on the topography of the plateau to a great extent. In summer, the temporal variation of OLR are related closely to the rainfall. The basic synoptic systems over the Plateau have quasi 8-day oscillations which are related to the activities of the plateau vorex. This oscillation may play an important role in linking the synoptic systems and the large-scale circulation over the Plateau.