To provide a presentation system and a presentation method for sequencing questions collected from questioners in the order of the height of interest for an audience and the height of significance for a presenter.

A slide significance calculation part divides the time-sequential data of the voice power of a presenter into a plurality of slide sections corresponding to respective slide images, and calculates the rate of a mean voice power in each slide section to a mean voice power in all the slide sections as slide significance. Then, a question slide matching part collates the switching time of the slide image with the snap time of a snap image photographed by a questioner, and specifies the slide number displayed at the snap time. Then, the question significance calculation part calculates question significance to the specified slide number by using the slide significance corresponding to the specified slide number and the number of questions collected with respect to the same slide number as the pertinent slide number.