What are the benefits of gastroscopy and colonoscopy? In 2009 Kun Kao, considered the father of fiber optics, was awarded the Nobel Prize. Kao’s discovery made endoscopy possible, and endoscopy has become the most intuitive, accurate and reliable means of diagnosis, and is considered the gold standard for diagnosing gastrointestinal diseases in the field of digestion. The development of endoscopy in the last decade or so is becoming more and more accurate, the discomfort during the examination is getting lighter and lighter, the lesions found are getting smaller and smaller, and more and more accepted by the general medical staff and the public, and the clinical practice for many years shows that the routine barium meal examination can no longer meet the needs of diagnosing diseases, plus its cost is not small, and there are concerns about X-ray radiation, some patients do barium meal examination several times a year, and are subject to more radiation and easy to This is not the best choice for doctors and patients. The accuracy of gastrointestinal ultrasound examination is too poor, and the operator cannot get accurate image information, and the reference value of the diagnostic report obtained is not much, which may lead to wrong diagnosis. Therefore, the most common and reliable method to diagnose gastrointestinal diseases is gastroscopy. Gastroscopy is not only the most accurate and reliable method to diagnose middle and late stage gastrointestinal tumors, but also has superiority in the diagnosis of early stage gastrointestinal tumors, and it is not only the only reliable method to diagnose gastrointestinal tumors in early stage, but also can be used for endoscopic treatment to achieve the purpose of radical treatment without surgery, so it is getting more and more attention and is the most effective method to reduce the mortality rate of gastrointestinal tumors. Who need to have gastroscopy? Patients with acid reflux, heartburn, dysphagia, abdominal discomfort, pain, weight loss, black stool, blood in stool, swollen lymph nodes on body surface, etc. need to have gastrointestinal examination. Gastrointestinal tumor-prone high-risk groups need to do gastroscopy, these groups are: people with H. pylori infection, people with more than 20 kg of normal body weight, smokers, people who often eat pickled food and smoked and barbecued food, people with gastrointestinal polyps or stomach surgery, people with long-term anemia, people who work in polluted environment such as smoke, dust and asbestos for a long time, people who are over 40 years old, people with tumor family messengers, people with blood type A, people with chronic atrophic gastritis patients, gastric ulcer patients, relatives of patients with familial polyps, etc.