Based on the results of water balance in the Hulun Lake from 1961 to 2002,and the available precipitation records near/over 100 years from 4 gauges in the Hulun Basin,relation between climate change and water level variation in the Hulun Lake was studied.Scenarios,based on water balance,discharge into the Hulun Lake in low water period and evaporation out in higher period,were adopted to assess the dried-up situation in the Hulun Lake in 1900s.The results show that,the dried-up situation in 1900s is uncertainty,it may be a mistake due to the careless survey in 1950s.