It is possible to improve a diagnostic performance by a dynamic image and in particular, to provide information effective for diagnosis of the lung ventilation function. Provided is a dynamic image capturing system (100) including: a calculation device (4) which calculates a dynamic feature amount according to a plurality of frame images of the dynamic image captured by an imaging device (1); and a diagnosis console (3) which displays the frame images of the captured dynamic image as a dynamic image display or a still image display on a display screen of a display unit (34) and colors at least one of the frame images with a color in accordance with a calculation result of a feature amount obtained by the calculation device (4). In the diagnosis of the lung ventilation function, the breast portion of an examinee is dynamically imaged over a plurality of time phases to calculate a feature amount and an estimated ventilation amount at each of the time phases, so that the calculation results are displayed on the display screen.