An image adjustment system and an image adjustment method include a camera, an image adjustment device, an image display device, and a controller. The image adjustment device includes an image generator and an image processor. The image generator generates a spherical image. The image processor acquires the spherical image from the image generator based on instruction information output from the controller and displays the spherical image on the image display device. The image processor rotates the spherical image based on the instruction information, and adjusts a captured image displayed on the image display device in accordance with the rotation of the spherical image.