Excessive fluid loss is often reported in gastrointestinal surgical patients due to preoperative fasting and bowel preparations. Insufficient fluid infusion may cause hypovolemia and tissue hypoperfusion, which may delayed postoperative recovery and even induce postoperative acute renal failure. The aim of this study is to compare the effects of Goal-directed fluid therapy (GDFT) strategy with that of the conventional fluid management on the morbidity and mortality of postoperative complications, length of postoperative hospital stay, and medical expense, so as to provide clinical evidences for optimized intraoperative fluid management for patients undergone gastrointestinal surgery.