Based on literature review and working experience, this study focuses on the designing of EMS questionnaires and engages the investigations of real cases from official reposts as well as 119 users. Areas of the investigation include Taoyuan county, Taichung city and Nantou county. Contents of investigations include possible influencing factors regarding the attributes of Emergency Medical Technician (EMT), the unit characteristic, the equipment function, administrative operation, the ability of EMT and the response of EMT. Test between variables or actors have been done by employing statistical methods such as factor analysis, reliability analysis, correlation analysis and regression model. Expected results are to understand the operation situations, find the determinants on the ability and response of Emergency Medical Technician, enhance the performance of EMS and provide references towards the improvement of emergency medical service quality. This mechanism will also be helpful for the emergency medical service system and the health of the public.