Painless gastroscopy is a new painless technology that allows patients to complete the entire examination and treatment process in a painless manner. After the examination and treatment, it usually takes only about 5 to 10 minutes of rest before going home. Traditional gastroscopy is long, painful, often nausea, vomiting and abdominal pain make gastroscopy difficult, or patients are afraid or refuse to be examined once they hear gastroscopy, and the three words “gastroscopy” give people the feeling of pain and nausea. According to relevant data, among patients who have received gastroscopy and treatment, about half of them are unwilling to undergo further examination, and more than one third of them have a fear psychology. This can delay the diagnosis and treatment of the disease without timely examination and cause lifelong regrets. According to the experience of senior medical professionals, the advantages of painless gastroscopy compared with traditional gastroscopy are: painless for patients, high definition, high resolution, no dead angle in gastroscopy, no damage, and high diagnostic rate. Painless gastroscopy and treatment are safe, short, and have high diagnostic rate.