Gastroenteroscopy is a common means to assist in the diagnosis of digestive system diseases, there is no reliable evidence to support the statement that gastroenteroscopy should not be done as much as possible, and generally gastroenteroscopy is safe and usually does not cause serious complications. Gastroenteroscopy is an operational technique that examines the esophagus, stomach, duodenum, colon, rectum and other parts of the body through the mouth or anus by means of a gastroscope or enteroscope, which not only can directly diagnose gastrointestinal diseases, but also take biopsy of the lesion area so that the subsequent pathology examination can clarify the type of lesion, which will help in the next step of diagnosis and treatment. With the continuous improvement and enhancement of gastroenteroscopy technology, endoscopy can also be used for minimally invasive treatment of gastrointestinal diseases such as polypectomy and microscopic hemostasis. Gastroenteroscopy has certain indications, patients need to be evaluated by a professional physician before the examination, such as electrocardiograms, etc. If the patient meets the conditions, generally there will be no accidents, and at this time, the patient should listen to the professional physician’s advice, and actively cooperate with the relevant examination.