To facilitate capturing of a plurality of images for forming a three-dimensional image while matching the coverage without compromising the merchantability.

An image pick-up system comprises a first image capturing device which captures a first captured image, and a second image capturing device which captures the first captured image according to the capturing of the first captured image and a second captured image used for forming a three-dimensional image. The second image capturing device has a second communication unit which transmits second preview image data generated by capturing a second preview image to the first image capturing device. The first image capturing device generates synthetic preview image data based on the second preview image data transmitted from the second image capturing device, and first preview image data generated by capturing a first preview image, and displays a synthetic preview image based on the synthetic preview image data.