Medical Humidifier is a device that uses microcomputer control to heat and humidify airflow for ventilators or other positive pressure systems. The airflow is heated and humidified by the surface of the hot water, reducing the stimulation of mechanical ventilation on the cardiopulmonary system and keeping the alveoli The humidity is good for sucking sputum and preventing airway obstruction; the heating temperature can be controlled by different gears, and this temperature can be monitored separately, which is suitable for use with various ventilators.