the present invention provides an imaging apparatus capable of monitoring a plurality of monitored sites in a switching manner by a single surveillance camera and an imaging system . provided are : an imager for imaging an object scene image so as to produce imaging data ; a cutout processor for cutting out one portion of the imaging data so as to create a plurality of cutout image data ; and an outputter for sequentially outputting the plurality of cutout image data to the external apparatus at a predetermined output interval .