Electronic bronchoscopy is one of the common tests for respiratory diseases. Electronic bronchoscopy is usually performed by entering from the patient’s nose or mouth, through the patient’s pharynx, epiglottis, and vocal folds into the trachea and fine bronchi, and is used to diagnose and treat lung and tracheal and bronchial lesions. Electronic bronchoscopy allows for observation of lesions under direct vision, as well as brushing or biopsy of lesions, allowing for the diagnosis of many tracheal, bronchial, and deep intrapulmonary lesions. In addition to examination, it also serves a therapeutic purpose. For example, to take out the bronchial foreign body, to remove the abnormal secretion in the airway, and to carry out the bronchoscopic treatment of benign or malignant tumors in the airway with laser, microwave, freezing, high-frequency electrocautery and so on. Electronic bronchoscopy is important for the diagnosis of unexplained hemoptysis, diffuse lung lesions of unknown nature, isolated nodules or masses in the lungs and other diseases. Currently, electronic bronchoscopy is painless and local anesthesia is administered during the procedure. The patient should fast for 4 hours and abstain from water for at least 2 hours before the electronic bronchoscopy. The patient will be instructed to empty his bowels before the test. In addition, not everyone is a good candidate for an electronic bronchoscopy. Patients who are allergic to anesthetics, extremely weak and intolerant or unable to cooperate, untreated active tuberculosis, coagulation disorders, uncontrollable bleeding tendency are not suitable for e-bronchoscopy. The decision should be made on an individual basis and in accordance with medical advice.