The performance of the Emergency Medical Service influences the public health, and even national images. Developed countries should be paying attention to the treatment to patients done by Emergency Medical Services. SARS virus causes great fear, injuries and fatalities. Our firefighters were responsible for sending suspected patients to hospitals in that anti-SARS campaign. This research discusses the influence factors with were collected and analyzed through relevant documents and literatures, and then utilizes the methodology of Data Envelopment Analysis to show the efficiency of each fire department. In this research the causes that affect the difference of relative efficiency were also analyzed. The expectation is to promote the performance for implementing emergent medical rescue of infectious diseases, and the utilization of resources of fire departments, and finally to ensure the health of the personnel involved in the emergent service activities and the public.