Some evidences from geomorphy, pollen and sediment have shown paleolake Qinghai has undergone at least three high-level stages since 40kaBP i.e.30-40kaBP, 11-13kaBP, 7.5-5kaBP.The second high lake-level stage was relevant to ice melting and wet/warm climate, while the other two stages are relevant to the whole global wet/warm climate.Using M.N.Byduko's equation of heat and water balance, and J.E.Kutzbach's equation of energy balance to compute the ground evaporation, the hydrological and energy balance of paleo-lake Qinghai as well as the water balance model of the whole closed basin, is estimated, i.e., the paleoprecipations of paleolake Qinghai are 645+/-5mm/a during 30-40kaBP, 595+/-15 mm/a during 7.5-5kaBP, which are 280mm and 235+/-15mm higher than current precipitation in Qinghai Lake area respectively-As a result, the corresponding high lake-level stages are deduced. During 30-40kaBP, 11-13kaBP and 7.5-5kaBP in Paleolake Qinghai, the paleo-lake level might be 104m, 104m and 45m higher than current Qinghai Lake level respectively.