The ensemble hindcast experiments of 11 members in summer(JJA) of 22 years were conducted by the BCC_AGCM2.0(T106L26) developed by National Climate Center.The capability of prediction in 500 hPa geopotential height,precipitation,and 2 m air temperature were tested by the cross validation and root mean square error methods.Results indicate that the model shows a good performance of 500 hPa geopotential height in the tropical region,oceans and parts of Eurasia.The simulation of precipitation over the mid-lower reaches of Yangtze River and most parts of South China has considerable reliability.The correlation coefficients of the 2 m air temperature anomalies in most parts of northern China are positive and pass the local significance test at 90% confidence level.However,the results in southern China are needed to be improved.Meanwhile,the ensemble forecast is much better than the single-sample prediction.The forecasting results can be improved by using the higher resolution atmospheric general circulation model.