Chronic atrophic gastritis has the possibility of becoming cancerous, but the chance is low, usually not more than 5%. The cancer rate of chronic atrophic gastritis is related to the severity of the patient’s condition, as well as the duration of the disease. Usually, mild chronic atrophic gastritis will not develop into cancer, and even in severe chronic atrophic gastritis, it takes quite a long time to develop into gastric cancer. From chronic atrophic gastritis to gastric cancer, it needs to go through the process of intestinal chemosis and atypical hyperplasia before gastric cancer appears. If chronic atrophic gastritis with intestinal chemosis, intraepithelial neoplasia or atypical hyperplasia is found during examination, the chance of cancer is usually around 5%. Therefore, the chance of cancer in chronic atrophic gastritis is relatively low. Patients need to undergo regular review and active treatment under the guidance of the doctor, which will occur to reduce the possibility of cancer.