Abstract: A teleconferencing system has a group determination information generating section for detecting the attention degree of a participant HM with respect to a monitor device corresponding to each of the other teleconferencing devices TCD and then generating information for grouping the other teleconferencing devices TCD corresponding to the individual monitor devices on the basis of the result of detection, and an information processing section for carrying out grouping based on the information, then generating group information indicating to which group each participant HM belongs, and processing image data and/or audio data from each of the grouped teleconferencing devices TCD on the basis of the group information.