Atrophic gastritis generally needs to receive gastroscopy plus pathologic examination to make a clear diagnosis. 1. Gastroscopy: through gastroscopy, it can be observed that the mucosa of the stomach appears red and white, usually white, vascular lines, mucosal folds are obviously narrowed, or even disappeared, and the seriousness of the disease can even be observed that epithelial cell hyperplasia, resulting in fine particles or larger nodules, which can be initially diagnosed. 2. Pathological examination: the pathological changes of atrophic gastritis generally include atrophy, abnormal hyperplasia and intestinal epithelial hyperplasia of the intrinsic glands in the gastric mucosa, and it is necessary to classify the severity of atrophic gastritis according to the reduction in the number of the intrinsic glands in the gastric mucosa: mild, moderate and severe. Atrophic gastritis has a certain degree of danger, it is recommended that patients need to actively accept treatment, and regular review of gastroscopy.