Gastroscopy can replace esophagoscopy, and the specifics of the esophagus can be seen during the gastroscopy. Gastroscopy enters through the nose or mouth and examines the esophagus before passing through the stomach and duodenum, so gastroscopy provides better screening for esophagitis, gastritis, and duodenal disease, and can be performed to obtain biopsy pathology without the need for additional esophagoscopy. Esophagoscopy is generally used for the examination of the lateral wall of the digestive tract and is only applicable to the esophagus, while gastroscopy is more comprehensive and widely used, and most units choose gastroscopy a little more, and the application of esophagoscopy is less at present.