A recording device according to an embodiment includes an imaging data acquisition unit configured to acquire imaging data including video data and audio data, an event detection unit configured to detect occurrence of an event; and a recording control unit configured to record first imaging data including the video data and the audio data in a recording unit when recording of the imaging data in the recording unit is caused by the event detected by the event detection unit, and record second imaging data including the video data and not including the audio data in the recording unit when recording of the imaging data in the recording unit is not caused by the event.