The indications for lung cancer surgery usually include stage I, stage II, some stage 3A, and those with stage 3B reduced to stage 3A through adjuvant chemotherapy. Certain lung cancers with metastases, but the metastases are solitary and have not reached the brain, liver, kidney, etc., can be considered for standard radical lung cancer treatment plus simple resection of metastases. Traditional judgment and analysis methods include chest CT, magnetic resonance imaging, ECT, abdominal ultrasound, neck ultrasound, etc. PET-CT can be used in developed regions to assess its stage. Mediastinoscopy and mediastinal lymph node biopsy can be used in hospitals with conditions to assess the stage.