The method for manufacturing the structure includes an imaging device installation process in which a camera 41 that obtains an image of a target hole 33 formed in an upper panel 31 is installed on the rear spar 22, and a positioning process in which relative positions are positioned by relatively moving the upper panel 31 and the rear spar 22 while the image of the target hole 33 obtained by the camera 41 and displayed on a monitor screen is aligned with a target line preset on the monitor screen.