The invention discloses a media recording method and device of cluster communication. The media recording method comprises the steps of sending a group-calling media recording request to a media recording server when a group-calling media recording service is triggered; receiving a recording response message of a media recording server, wherein the recording response message comprises the identifier of a media channel; obtaining a group-call media and current group-calling information, wherein the current group-calling information comprises speaking right information; packaging the group-calling media and the current group-calling information into a RTP package, and sending the RTP package to a media recording server through the media channel; and when the group-calling is ended, sending arecording stop message to the media recording server to inform the media recording server of stopping recording the group-calling media, generating a media file in a preset format by using the group-calling media, and generating a caption file in a preset caption format by using the speaking right information. According to the media recording method and device of cluster communication, the speaking right information can be displayed when the recorded group-calling media is played.