This study was designed to evaluate the effect of art therapy using five-senses experiences on the cognition, emotions, and sensorimotor function of patients with early senile dementia. The subjects were nine patients who were aged in their seventies or eighties and diagnosed with early senile dementia. They participated in the therapy at a daycare center called S, located in Gwangju city, South Korea. Sixty-minute art therapy took place from April 28, 2017, to September 1, 2017, once a week, for a total of 17 sessions. In order to evaluate the cognition, emotions and sensorimotor function of the subjects, We developed a new analytic tool measuring the behavior and attitude of subjects and their art products during the art therapy. The method focused on three areas: cognition, emotions and sensorimotor function. Scoring was carried out by three peoplewho participated in all programs and, measured the three areas at the beginning of the study and in the last three classes. Inter-rater reliability was measured by intra-class correlation coefficient and all scores were statistically analyzed using Wilcox signed-rank test, a nonparametric method. The result showed that the art therapy had a positive impact, as evidenced by significant improvement in cognition, emotions and sensorimotor function of the early senile dementia patientswho participated in the study. Among the areas positively affected, color perception, a sub-item of the cognition area, showed the most significant improvement.