The present invention relates to the field of communications. Provided are an information transmission method, apparatus and system. The information transmission method comprises: broadcasting and sending a request for transmitting information through a server in a manner of broadcasting signaling in a process of establishing an association in short-distance wireless communication; receiving an information acquiring request sent by a second communication apparatus in a manner of broadcasting signaling in a process of establishing an association in short-distance wireless communication; and sending a first information sending request to the server, the first information sending request carrying a user identifier of the second communication apparatus and first related information, so as to transmit the first information through the server. By implementing the method, communication can be performed between users without the need of recording network communication information of an opposite side, and because a data amount of a user identifier is small, a short-distance communication channel does not need to be occupied for a long time and accordingly the problem of channel congestion can be solved and the information transmission efficiency is high.