A dual-purpose room for spray painting and drying was introduced,using actual projects as examples,based on typical painting processes and requirements,the system operation process of spray drying dual-use room under spray painting,leveling,and drying conditions were detailed in detail,also the working principle and equipment composition and the key equipment were detailed in detail too.Calculate the exhaust gas treatment under different operating conditions and form conclusions based on the main design parameters and coating information.By overall planning and designing,new ideas were provided for designing of spray drying dual-use rooms for large-scale industrial products in China.