Abstract: The data of evidence-based medicine clinical trials and large databases showed that anastomotic leakage, pancreatic leakage and abdominal abscess were the most common complications after gastrectomy, and the complication rate was about 20% and mortality rate was about 1%. Postoperative complications criteria of gastric surgery is mainly used Clavien Dindo classification of surgical complications, Common Terminology Criteria for Adverse Events (CTCAE v4.0) and Japanese Clinical Oncology Group (JCOG) as evaluative standard. The performance status, American Society of Anesthesiologists score, physiological operative severity score for enumeration of mortality and morbidity (POSSUM), E-PASS scoring system, acute physiology and chroaic health evaluation (APACHEⅡ), Charlson comorbidity index and frailty score were used in predicting postoperative mortality and morbidity in gastric cancer patients. Authors can objectively evaluate risk of surgery and reasonably use these scoring systems for perioperative management.