A communication method and apparatus between heterogeneous platforms. A communication method of an interaction server that enables an interaction between a first platform server and a second platform server providing different platforms includes receiving, from the first platform server, a token request that includes first user identification information registered to the first platform server; transmitting, to the first platform server, a token that is created based on integrated user identification information corresponding to the first user identification information; receiving, from the second platform server, a request for verifying a validity of the token transferred from the first platform server to the second platform server; and transferring, to the second platform server in response to the validity of the token, second user identification information that corresponds to the integrated user identification information and is registered to the second platform server.