Abstract: The definition of ambulatory surgery by the China Ambulatory Surgery Alliance refers to an operation (excluding outpatient surgery) completed within one day (24 h). For the patients with special conditions who have to prolong hospital stays, the length of hospital stays should not exceed 48 h.Enhanced recovery after surgery (ERAS) is a series of optimized perioperative treatments with evidence-based medicine that can reduce perioperative stress and inflammatory responses, promote rapid recovery, and improve patients' perioperative safety and comfort. Ambulatory surgery has the advantages of short hospital stay and high rate of bed rotation. Based on these characteristics, optimized anesthesia management under the concept of ERAS can enhance the safety, comfort, and efficacy of ambulatory surgery.