A universal design means a progressive and challenging design in the 21st century which can satisfy the demands from not only aged people and disabled people but also numerous members of our society. This research aims to apply a universal design commonly used in architecture (environment) and products to costumes, so as to convert the design into a universal fashion which can meet the aesthetic values, desires, and functionality of aged people and disabled women. After applying the said five universal fashion principles and design factors, a total of 20 pieces of universal fashion prototype products are produced through functional designs and designs utilizing knit materials and health & functionality materials. In addition, a direction to develop universal fashion products is suggested for costume manufacturers, for the purpose of facilitating the practical use of a universal fashion. The present author expects that human-centered universal fashion costumes shall propose the orientation of the interest in future new designs, beyond the scope of a jump in the quality of simple functional costumes.