A social network platform based on electronic maps includes at least an electronic device, a network system and a server, the electronic device having a client application program connected to the server via the network system to read, upload or download an interactive message, the server having a database and an electronic map module, the database saving the interactive messages received by the server, the user defining a searching condition via the client application program to cut off a section of a map picture from the electronic map module, each interactive message which is located at where the map picture corresponds to being shown and labeled on the map picture, the user reading, replying or downloading the interactive messages which are shown on the map picture. Under this arrangement, the users continuously share feelings and make discussions about what the users interest in, so that the users expand interpersonal relationships.