Abstract: Objective: To evaluate the effects of emergency triage system. Methods: With convenience sampling method,300 patients (100/month) visiting the emergency department in January, April and August 2012 were selected as the control group, and another 300 patients visiting the emergency department in January, April and August 2013 as the experimental group.After adopting the new emergency triage system in experimental group, the waiting time of critical ill patients, the occurrence of unexpected events and the satisfaction of both patients and emergency stuff were compared. Results: The waiting time of critical ill patients in experimental group was shortened significantly, and their satisfaction was higher comparing to the control group (P<0.05). The critical ill patients of the experimental group have no accidents during the waiting time. The medical stuff is quite satisfied with the new triage system. Conclusion: The new triage system is effective to improve the emergency department environment, shorten the waiting time of critical ill patients, reduce the rate of medical accidents and improve the satisfaction of the emergency patients. The medical stuff is satisfied with this new system and it worth spreading in the clinic.