Gastroscopy requires preparation of medication, diet, psychological preparation and pre-test evaluation. Before doing gastroscopy need to fasting water 4 to 6 hours, because patients do not fasting water in doing the examination will cause nausea and vomiting, affecting the doctor’s judgment. Some elderly patients who have been taking antiplatelet drugs and anticoagulants for a long time need to abstain from drugs for 5 to 7 days to avoid causing gastrointestinal bleeding. Oral anesthesia under the guidance of the doctor before the examination to prevent discomfort during gastroscopy. Before the colonoscopy generally need to take oral polyethylene glycol and other purgative agents good medicine to discharge the intestinal feces in the water-like, to avoid covering the intestinal mucosa to affect the observation. General enteroscopy through the anus into the mirror, not anesthesia, there will be pain and discomfort. It is recommended that patients be psychologically prepared to cooperate with the examination. Painless colonoscopy gives anesthetics through the vein, and the patient has no pain. In addition, patients with severe heart and lung disease need to be thoroughly evaluated to determine if they are suitable for gastroenteroscopy. Patients with high blood pressure need to have their blood pressure lowered to normal before the test. Patients are advised to prepare in advance under the guidance of the doctor before the gastroenteroscopy and actively cooperate with the doctor’s treatment.