Based on the WeChat ecosystem, the electronic health card can be realized as follows: three-step operation for new users, real-name card building; One-click collection for old users and batch upgrade; One-click registration and quick association for cross-hospital users. At the same time, the functions of unified card package query, medical navigation and cross-hospital report query are realized. This scheme helps to promote the interconnection between medical institutions and the intelligent integration of "Internet+medical and health services".