A color adjustment determination method is provided that includes forming a color adjustment image on a recording medium by moving a plurality of heads including a plurality of nozzles relative to the recording medium in a relative moving direction and ejecting liquid from the plurality of heads that are arranged in an orthogonal direction orthogonal to the relative moving direction, acquiring colorimetric values of a plurality of portions of the color adjustment image formed by the plurality of heads that are arranged at different positions in the orthogonal direction, calculating a color difference between at least two portions of the plurality of portions of the color adjustment image based on the colorimetric values of the plurality of portions, and determining whether at least one of the plurality of heads that have ejected the liquid requires adjustment based on the calculated color difference.