At present, Medical Information Exchange Standard HL7 mainly regulates the communication between HIS/RIS system and its equipment, which involves ward and patient information management, laboratory system, pharmacy system, radiation system, charging system and so on. The purpose of HL7 is to develop hospital data information transmission protocols and standards, standardize the formats of clinical medicine and management information, reduce the interconnection cost of hospital information systems, and improve the degree of data information sharing among hospital information systems.