Bronchoscopy and CT belong to different types of examinations, and it is not possible to directly compare which of the two is more accurate for lung cancer. Bronchoscopy is the use of bronchoscope to enter the trachea through the oral cavity or nasal cavity to directly observe the lesions in the lobes, segments and sub-segments of the bronchial tubes, and it can carry out biopsy, bacteriology and cytology, and it can detect the tiny lesions that can not be seen on the CT, and the examination together with the biopsy is the gold standard for clarifying the lung cancer, but it is lower for the diagnosis of the external peripheral nodules of the lungs. CT is a kind of imaging examination, which cannot directly diagnose lung cancer. It can observe the size of lung nodules, nodule morphology and changes around the nodules to determine the risk of tumors, and biopsy is still needed to clarify the highly suspected tumors. However, since CT is a non-invasive examination, it can observe the whole lung tissue imaging changes and be used for physical examination and tumor screening. If a patient suspects the presence of lung cancer, it is recommended to consult a doctor in time and choose a specific test based on the doctor’s evaluation.