The platform integration study on hospital management information system with common interface had the data exchange and sharing on several information platform come true. The external study is to apply the results to bigger score and operating surroundings. The study about Computer-Based Patient Record (CPR) on Health Level Seven (HL7) combing the middleware is to achieve the uniform data and function so that we can exchange and share the medical information. After analysis of the data requirement between the hospital and the medical enterprise, the community medical platform was designed on the HL7 engine to satisfy the data communication and transmission. Combing the middleware the integration platform had the function of query and sharing.