We examined the functions of the barrier-free basic plan system in the case of ordinance-designated cities. The purpose of this study is to clarify the function of the barrier-free basic plan system and to suggest a method for setting priority development areas. This study conducted a literature search on the barrier-free basic plan system of ordinance-designated cities, and clarified the differences in department and from. Next, this study conducted a hearing survey with the person in charge of the local government, focusing on the ordinance-designated cities in the Kansai region. Based on the survey results, this study clarified the functions of the barrier-free basic plan system and proposed a method for setting priority development areas in ordinance-designated cities.