Gastric cancer is a common disease nowadays and gastroscopy is the main screening tool. 3723 healthy people participated in this study, and the participants had gastroscopy once a year for 5 years. The results of the study concluded that: for healthy people over 70 years of age gastroscopy should be performed once a year; for people aged 60-69 years, it should be performed once every 2-3 years; for people aged 50-59 years, it should be performed every four years; for people under 50 years of age, it should be performed once every 5 years or more.