MONITORING SYSTEM

PROBLEM TO BE SOLVED: To provide a monitoring system under the consideration of privacy by, even when any portion other than a monitoring region is photographed by a robot, masking the portion other than a monitoring region from the image.SOLUTION: A monitoring system for monitoring a predetermined monitoring region by displaying an image photographed by a mobile robot includes: a storage part for preliminarily storing a monitoring space map as three-dimensional space information in which at least the monitoring region and an inhibition space are set; an attitude calculation part for calculating a photographing position and attitude information in the monitoring space map of a camera loaded on the mobile robot; a photographic space calculation part for calculating the photographic space of the image in the monitoring space map from the photographing position and attitude information when the mobile robot photographs the image; and a mask processing part for calculating a region on the image in which the inhibition space is overlapped with the photographic space as a mask region, and for performing mask processing for making it difficult to view the mask region.