Chronic obstructive pulmonary disease (COPD) cannot be cured once it is developed. Although it cannot be cured, it can be well controlled, as long as regular medication and regular review, it can be well controlled, so that this type of patients can have a good quality of life as normal people, the prerequisite is early detection, early diagnosis and early treatment. If the disease is detected at an early stage, diagnosed and treated early, and well controlled, the disease will not deteriorate further and will not cause great damage to lung function, which will have little impact on the patient. If not given enough attention, as the disease develops and progresses, the damage to lung function becomes more and more serious and affects lung function, and the patient suffers very much in the middle and late stages, with a poor quality of life. How to early detection and diagnosis of this disease, must pay attention to several points, the first has no history of smoking. In addition, there is no firewood, the kitchen exhaust system is not good, burning firewood, smoke, there is no a history of tobacco exposure, there are more patients playing mahjong, although not smoking, no history of firewood exposure, but mahjong hall others smoke, mahjong hall stay longer, long-term inhalation of secondhand smoke, is also a high-risk factors. If people with high-risk factors are also older, over 40 or 50 years old, they must pay attention and go to the hospital for pulmonary function tests. Because sometimes the symptoms are judged atypical, there can be no cough, coughing, shortness of breath, and definitely no chronic obstructive pulmonary disease. Sometimes people are very tolerant and may not pay enough attention to the symptoms of shortness of breath and consider it normal, but if the lung function test reveals that they may already have the disease, such patients who have any symptoms of respiratory tract, such as coughing, coughing or having slight shortness of breath or not enough, it is recommended to have a lung function test at the hospital early to determine whether they have slow obstructive pulmonary disease. If COPD is detected early and standardized treatment is started early, it will have a slight effect on lung function damage or even have a protective effect, and the lungs will not develop to an irredeemable stage and affect the quality of life. Chronic obstructive pulmonary disease once developed cannot be cured, but early diagnosis, early detection, and early prevention are possible to prevent the disease from progressing to a serious degree.