This study aims to develop motifs and patterns for fashion cultural product designs in order to promote the Iksan Seodong Festival, which is the most representative festival in Iksan region. The motifs and patterns developed in this study can be used to introduce the distinct traditional culture depicting the legendary Seodong tale. This study used Adobe Illustrator CS4 and Adobe Photoshop CS4 to reconstruct the lotus motifs found from the green-oiled-lotus-motif rafter tile, the atrifact from Iksan Mireuksaji Museum. This lotus motif and the motif based on the Iksan City's logo were applied to a repeating pattern with colorways using the CMYK found from the Iksan city's logo. A total of 24 product designs, including 8 necktie designs, 8 scarf designs, and 8 T-shirts designs, were presented for fashion cultural products. The designs developed in this study can promote not only the local Iksan culture but also the national image of Korea on a global scale.