Gastroscopy is divided into ordinary gastroscopy and painless gastroscopy, if the patient for ordinary gastroscopy generally about half an hour can, if the patient for painless gastroscopy generally need about 2 hours. Ordinary gastroscopy, patients can generally take drugs through the oral cavity into the gastroscope for testing, generally about half an hour to fully observe the esophagus, gastric mucosa, clear with or without inflammation, polyps, lumps and so on. While painless gastroscopy requires general anesthesia and cardiac monitoring, the general inspection items are the same, but the general anesthesia and patients need time to wake up, so the time is longer. In addition, different hospitals have different testing equipment, and different doctors’ operating level and operating habits will lead to slight changes in the examination time.