In the clinical practice of “treating the undiseased”, oxygen therapy is an effective technical means that has not yet received sufficient attention and application. In fact, reasonable and standardized oxygen therapy can play a unique role in “preventing diseases before they occur”, “preventing changes in existing diseases” and “preventing recurrence after disease”. As we all know, oxygen is an indispensable element for all life activities. Four minutes of oxygen deprivation, life will “fall short”. The occurrence and development of many diseases are closely related to acute and chronic ischemia and hypoxia. One of the root causes of subhealth is the lack of oxygen in tissues and organs; human aging is also highly related to the lack of oxygen. Oxygen deficiency is the cause of all diseases; oxygen is sufficient for a strong body. Oxygen intake is the most direct and effective way to improve oxygen deficiency in human body. Oxygen is the most direct and effective way to improve oxygen deficiency in human body. Oxygen intake can maintain sufficient oxygen supply, which has obvious effects on disease prevention and anti-aging, eliminating fatigue, relieving tension and regulating overuse of brain. Regular oxygen intake, stage correction of tissue cell hypoxia, can slow down and reduce the speed and number of cell death, and help prolong life. “Oxygen supplementation does not make you sick” has become a new concept of health care actively advocated by some scholars. We call it oxygen therapy for the treatment of the unhealthy. Oxygen therapy usually has three kinds of oxygen supplementation methods to choose from: general oxygen, saturated oxygen and hyperbaric oxygen. Only from the human body “oxygen” effect assessment, ordinary oxygen is not as good as saturated oxygen, saturated oxygen is not as good as hyperbaric oxygen. It is safer and more convenient than hyperbaric oxygen and has better efficacy than ordinary oxygen. It can make the concentration of oxygen inhaled by oxygen users nearly double that of ordinary oxygen and increase the dissolved oxygen in the blood by 6 times, which greatly increases the oxygen supply of the body, thus achieving the purpose of replenishing the true qi, stimulating qi and blood and promoting health. The meridians are the “rivers” and “lakes” in the human body, flowing day and night, clearing stagnation and eliminating waste, and delivering nourishment. It is the “water” resource that can’t be stopped to maintain the life activities of the body. The stagnation and depletion of meridians can cause “drought and flood” in the human body. In other words, if the meridians of the human body do not function properly in running the whole body, contacting the surface and interior of the body, communicating between the upper and lower parts of the body, and regulating the functions of the whole body, diseases will follow. Oxygen therapy for treating the untreated diseases, mostly using saturated oxygen inhalation method. If you can work with the meridian adjustment while saturating oxygen, the combination of Chinese and Western medicine can often produce the health effects of 1 + 1 > 2. Sometimes, it can even reap surprisingly good results. Oxygen therapy treats the untreated, and usually allows people to complete a body care and health maintenance in a more comfortable process.