The liquid status and rule on the effect of the mechanical ventilation and difference in temperature inside the double curtain wall are researched. And the consecutive and temperature field equations are constituted. In summer

the conversion efficiency of solar energy battery module about the working environment temperature was investigated. The building and photovoltaic battery modules temperature decrease performance by the hot air flow inside the double curtain wall are calculated. Finally

the physical model of energysaving photovoltaic double curtain wall is tested and the calculated results are compared and analyzed.