[Object] To provide an information processing device capable of establishing a sound statistic database with high usability. [Solution] The information processing device includes: a feature amount extraction unit configured to extract a feature amount from sounds in a predetermined space; an identification unit configured to identify a type of a sound included in the sounds from the feature amount; an information combining unit configured to generate sound statistic information in which the feature amount, the type of the sound, and spatiotemporal information of the predetermined space at a time of acquisition of the sound are associated with each other; and a database establishing unit configured to establish a sound statistic database by using the sound statistic information.