Gastrointestinal scanning examination is not comprehensive enough, and can only roughly see the gastrointestinal and external conditions in the abdominal cavity, which may cause leakage of diagnosis for some polyps, inflammation and other lesions in the cavity. The details of the gastric mucosa are not well observed during the external scanning, so the accuracy of the gastrointestinal scanning examination is not very high. Gastrointestinal ex vivo scans are not usually used for more detailed examinations of gastric disorders. Common stomach and esophagus diseases, such as chronic gastritis, peptic ulcer, gastric polyps, pyloric obstruction, esophagitis, and gastroesophageal reflux disease, etc., the above mentioned diseases require gastroscopy for a definitive diagnosis. The advantages of gastrointestinal scanning examination are that it can avoid direct contact with the inside of the body, reduce the risk of cross-infection, expand the scope of the examination, and generally do not experience discomfort after the examination. The operation is relatively simple and time-consuming. When gastrointestinal discomfort occurs, it is recommended to consult a doctor in time and follow the doctor’s instructions to choose the examination program.