Gastric cancer refers to a malignant tumor that occurs in the gastric mucosal epithelium. Special attention should be paid to the diet, appropriately supplementing with multivitamins and consuming more fresh foods, such as fresh green vegetables and fruits. The diet should be diverse to avoid favoring certain foods overly and to ensure the intake of a variety of nutrients. It is also necessary to eat some meat for protein, avoid moldy foods, reduce the consumption of pickled, salted, smoked foods, and those rich in nitrites, and avoid the irritation from strong tea, coffee, and hard liquor. In addition to dietary measures, active treatment for early-stage gastric cancer can include endoscopic mucosal resection, or one may opt for a major gastric resection surgery or radiotherapy, while maintaining a good psychological state and sufficient sleep.