Coating treatment method, storage medium, and coating treatment device

A coating treatment device, comprising:

• an image acquirer configured to individually acquire surface images of a plurality of substrates, wherein different films are formed on surfaces of the plurality of substrates by supplying a processing liquid of different ejection amounts;
• an image converter configured to obtain a plurality of polar-coordinate-converted images by converting the surface images of the plurality of substrates to polar coordinates, respectively;
• a display part configured to display one or more polar-coordinate-converted images of the plurality of polar-coordinate-converted images on a screen in association with information specifying the different ejection amounts of the processing liquid ejected to the plurality of substrates from which the one or more polar-coordinate-converted images are captured;
• and
• an ejection amount determiner configured to determine the different ejection amounts of the processing liquid ejected to the plurality of substrates when forming the different films of the processing liquid based on an instruction of a user relating to a display content on the screen.