A liquid droplet drying device includes: a drying unit that includes a plurality of light sources emitting light to a liquid droplet ejected to a recording medium by a forming unit which ejects the liquid droplet to form an image and drying the image and in which an amount of light of each of the plurality of light sources is variable; and a correction unit that corrects the amount of light of each of the plurality of light sources so that a light amount distribution of the drying unit is within a range of a pre-decided target using light amount information obtained by reading the amount of light emitted from each of the plurality of light sources by a reading unit which reads the image formed on the recording medium by the forming unit.