The embodiment of the invention provides a client version compatibility realization method and apparatus. The method comprises: target information sent by a first client is received; an information format of the target information is converted into a target format, wherein the target format is an information format that corresponds to a version of a second client and is associated with the type which the target information belongs to and the second client is one as a receiving terminal of the target information; and the target information with the converted target format is sent to the second client. Therefore, because of processing of version compatibility at a server side, a version compatibility problem is solved and occupation of resources of the client can be avoided; and development of new functions of the client can be protected, so that the user experience can be improved.