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 reports as well as 119 users. Areas of the investigation include Taoyuan county, Taichung city and Nantou county. Contents of investigations include age, gender, working periods, education level and EMT certificate regarding the attributes of Emergency Medical Technician (EMT), human resources, training, volunteer and dispatching rates regarding the unit characteristics. Tests between variables or factors have been done by employing statistical methods such as difference analysis and analysis of variance in order to understand the effects on EMT performance. We try to enhance the performance of EMT and assure life safety of people. This mechanism will also be helpful to provide suggestions toward the improvement for the emergency medical service system and the health of the public.