The embodiment of the invention discloses an information transmitting method and device. The information transmitting method includes the steps that a multicast joining request is transmitted to an information transferring device, wherein the multicast joining request indicates a target multicast group for joining; a multicast joining result returned by the information transferring device according to the multicast joining request is received, and when the multicast joining result is successful joining of the target multicast group, audio playing information transferred by the information transferring device according to the target multicast group is received. According to the information transmitting method and device in the technical scheme, due to the multicast mode, when an audio device sends a multicast message, all member terminals in the multicast group can receive the audio playing information transferred by the audio device through the information transferring device; compared with the prior art, the bandwidth occupied in the information transmission process is saved, and waste of network resources is reduced.