The difference between a mask ventilator and a cannula ventilator is that one is a different interface connected to the body, and the other is a different group of people for whom it is suitable. The function of the ventilator is to help the body breathe, increase lung ventilation and improve respiratory function. Mask ventilators and intubation ventilators work on the same principle, mainly because of the different interfaces connected to the human body. Mask ventilators are connected to an oxygen mask at the end of the breathing line, while intubating ventilators are connected to an endotracheal tube at the end of the breathing line. Tracheal intubation is an invasive operation, which needs to be done through the patient’s mouth or nasal cavity up to the airway. In addition, mask ventilators are generally used for conscious patients and require the patient’s cooperation. Intubating ventilators are used for patients who are unconscious or under sedation. It is recommended that when choosing between mask ventilators and intubation ventilators, they should be used strictly under the guidance of a medical professional.