1.Control of smoking is the primary measure. 2.Improving the air quality indoors and outdoors is another important means to prevent lung cancer. 3.To carry out labor hygiene and strengthen occupational protection to prevent occupational lung cancer. 4.Dietary prevention and chemoprevention, eating more green leafy vegetables and tomatoes are very prominent in the protection of lung cancer. Take more vitamin A and carotene to prevent lung cancer. 5.Primary screening and early diagnosis for people with high risk of lung cancer. X-ray, sputum cytology, fiberoptic bronchoscopy, etc. should be performed to obtain early diagnosis and treatment. 6. To provide comprehensive and effective treatment for diagnosed lung cancer, prevent recurrence and metastasis, focus on rehabilitation, palliative and pain relief treatment, and provide physical, psychological, nutritional and exercise guidance to maximize the survival rate and quality of life of patients.