Gastric ulcer with huge surface, dirty moss and hard texture generally suggests that there is a high possibility of gastric cancer, but biopsy pathological examination is needed to confirm the diagnosis. In the process of gastroscopy, if obvious whitening and roughness of mucosa, or bulging and ulceration of mucosa are found, it is necessary to take biopsy and send it to pathology, because pathology is the gold standard of diagnosis. However, the clinician will first write a gastroscopy report based on the observed phenomena and give a suspicious diagnosis according to its characteristics. Gastric ulcer with huge surface, dirty moss, and hard texture is a term used in writing gastroscopy report, which represents the possibility of malignant ulcer, but whether it is diagnosed as gastric cancer or not needs to be combined with the result of pathology report.