This thesis describes the National Taiwan University Hospital emergency medical information system currently undergoing development, with particular reference to the use of radio frequency identification systems (RFID) and its associated automated login page. The system is used for a service-oriented architecture (SOA), inclusive of an HL7Central Web Service. This network service enables greater flexibility in the exchange of medical information systems, in addition to an increase in the operating speed of the emergency personnel, thereby facilitating a more professional environment for patient care.