A. Two-loop ventilation system controlled by computer. B. In-phase ventilation canbe carreed on to the two-sided lung (ill lung or well lung) through separation ventilation, and also anti-phase ventilation management and ventilation tretment. C. Two-humidifying-loop can humidify and antibacterial treat respectively. D. Good quality humidifier adaptor gainingnational patent is disposed to heat or ultrasonic humidifying conveniently. E. Two-loop with parameter monitoring of ventilation frequency, Sigh and Driving pressure also can alarm when no power or oxygen lack