The wireless sensing network technology, communication technology, password technology, etc. were adopted to carry out the overall design to the digital medical system under the network environment, in order to realize the functions of the remote medical diagnosis, health care, locating and tracking, emergency calls and first aid. In this paper, the design method of the community and personal digital medical system was expounded and the overall design scheme of the digital medical system was provided, including the function module design such as the user terminal system, safety call system, electronic medical records system, hospital information management system, diagnosis expert system and emergency center control system.