Abstract: An image adjustment system includes: an image projection device that projects a projected image onto a projection target; an imaging device that acquires a first image by capturing an image of a first region including a part of the projected image and a second image by capturing an image of a second region including another part of the projected image, the second region including an overlapping region in which the first region and the second region overlap; and a controller that controls a projection position of the projected image. The controller converts a first and a second coordinate systems of the first and the second images into a combined coordinate system common to the first image and the second image, generates correction information including position information indicating a projection area of the image projection device in the combined coordinate system, and generates the projected image based on the correction information.