The appointment for colonoscopy requires registration with the Department of Gastroenterology or the Gastroenterology Endoscopy Center, depending on the hospital department to which the patient is assigned. The patient or patient should go to the hospital and be examined by e-colonoscopy under the guidance of a gastroenterologist as appropriate. The presence of lower abdominal discomfort accompanied by stool changes or simple stool changes, such as increased frequency of stool, constipation, diarrhea, black stool, or bloody stool, requires improvement of e-colonoscopy. In addition, people over 50 years of age and those with a family history of colon cancer need routine medical e-colonoscopy to understand whether there are intestinal lesions, and if necessary, they need to cooperate with a specialist to give regular treatment. If intestinal polyps are found, electrocoagulation and electrosurgery of polyps under colonoscopy is required.