Whether early stage lung cancer can live for 40 years cannot be determined, but the 5-year survival rate of early stage lung cancer can reach more than 70%. The prognosis of lung cancer is better when it is detected, diagnosed and treated early, because the lesions of early stage lung cancer are more limited, and the malignant tissues can be removed by surgical resection clinically in order to eradicate the disease. After receiving systematic treatment, the prognosis of early stage lung cancer is generally better, and the 5-year survival rate is generally above 70%. But it is not certain whether it can live for 40 years. Patients with early stage lung cancer must pay attention to follow the doctor’s instructions to come to the hospital regularly for rechecking of chest CT, blood routine, tumor markers and other related examinations to clarify the patient’s health status. If there is recurrence of the disease, patients should cooperate with doctors to receive treatment as soon as possible so as not to affect their life and health.