By establishing the Electronic Medical Records(EMR) system of regional obstetric outpatient departments in Hangzhou, the paper introduces functional modules of the system, including pregnant and lying-in women with high risks and crisis value, prenatal examination list and pregnant woman files, elaborates on the system's requirements for interconnection and interworking and data exchange standards, puts forward specific measures, and points out that the system is conducive to the improvement of quality of perinatal period caredata and the realization of the interworking and sharing of regional maternal and childern information.