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To explore the energy saving effect of building envelope,the experiments were carried out through a comparison of basic cubicle in summer.Experiments show that if energy efficiency measures are applied only in the external walls and windows,the energy saving cubicles have an average energy efficiency ratio of 27.75％ and 27.05％ when the air change rates are 1.1 and 1.4 h-1 in summer,with both values being over the standard target value by 25％.And the indoor air temperature of the energy saving cubicle is below that of the basic cubicle.The daily mean temperature difference between the interior surface of insulation wall and no insulation reaches 1.47 ℃,and the mean temperature difference is up to 8.52 ℃ between the interior surface and exterior surface of insulating glass and single glass.The two cubicles were simulated for energy consumption using VisualDOE4.0 software under real weather conditions in summer.The results show that the mean deviation is 10.02％ between experimental and simulated energy efficiency ratio.The correctness and validity of simulation results of the VisualDOE4.0 software are proved.