The oxygen generator adopts high-tech bipolar oxygen production technology. The oxygen generating module in the instrument automatically selects oxygen molecules in the air under normal pressure and ionizes them into negative oxygen ions. Negative oxygen ions are drawn into the module by the attraction of the anode. When the negative oxygen ions reach the anode, they release electrons and are reduced to oxygen with a purity of about 99%. Then the air is mixed with the air pump to adjust the oxygen concentration and gas output, so as to obtain 30% - 99% high concentration oxygen. It has reached the level of medical treatment, treatment and health care. Oxygen inhalation, health care, health care, can be done every day.