Gastric cancer and gastric polyps are different from each other in terms of pathological structure as well as appearance. Gastric polyps seen by gastroscopy are smoother, while gastric cancer has uneven surface, deep red color, ulcerative type, and polypoid gastric cancer with bleeding and edema on the surface. Gastric polyp is the growth of protruding tissue on the surface of gastric mucosa, which is a benign lesion, but it may be malignant, and can be surgically removed with better prognosis and lower recurrence rate. Gastric cancer is a protrusion on the gastric mucosa, which is malignant and needs to be staged according to the nature and size of the tumor and whether it has metastasis to decide the treatment plan. Although gastric polyps are benign lesions, long-term untreated and irritated may lead to further deterioration and even occurrence of gastric cancer.