In this study, we conducted a walking experiment related to floor design and verified the influence and effect of the floor design with illusion on the differences between the atypical and typical developmental groups by using subjective evaluation and biological response measurement. Through this experiment, we found that some floor designs Even if had the same visual image, the atypical group was found to have more negative emotions compared to the typical group. An increase in heart rate due to exposure to factors that increase mental tension and, indicated that by the design of the floor could hinder smooth walking.