Although demand for emergency medical services (EMS) is growing, sustaining EMS becomes more difficult and costly. It becomes a big problem, especially in Japan, that faces the problem of aging society. In this paper, we propose a smart EMS system. In order to increase efficiency of EMS, we focus on providing and sharing the information in real-time. In our system, Smart ambulance provides its location and patient information using video streaming in real-time. We realized a low latency streaming for communication, and remotely camera control system using touch panel. In evaluation, we showed that the video stream latency of our system was 45% lower than these of other methods.