Lung cancer has become the number one malignant tumor, but if detected and treated early, good results can be obtained. Early stage lung cancer is usually asymptomatic or with very mild symptoms, some of which are detected during chest X-ray or chest CT examination during physical examination, while others only have mild cough or chest discomfort. When cough and blood in sputum appear in autumn and winter, it is easy to mistakenly think that it is just a symptom of cold in this season, but in fact, it may be a manifestation of early stage lung cancer, therefore, we should pay great attention to it and go to hospital as early as possible. Especially early stage lung cancer can be cured by minimally invasive resection of the lesion under thoracoscopy, and most of them do not need chemotherapy and radiotherapy.