This study mainly focuses on audience development of dance festivals by applying 7Ps Marketing Mix in the Seoul Dance Festival, which is the first dance festival in Korea. The whole performances in the 39th Seoul Dance Festival(2018. 10. 22 - 12. 04) were sold out, and the festival was evaluated as one of the most successful dance festivals in its history. 7Ps Marketing Mix is the set of marketing tools consisting of Product, Price, Place, Promotion, People, Physical Evidence and Process. According to this analysis, the festival has succeeded because of its qualified programing, aggressive promotion, well-equiped venues, suitable environment, well-trained staff and reasonable ticket prices. To enhance its popularity for the dance festivals, the festival shall collaborate other dance groups which would open their shows during the festival period, manage specified SNS contents, plan the outdoor events before and after the main shows to set the festive mood, make the specialized ticket prices for the festival, manage volunteers more effectively and adopt e-ticket reservation system. This study aims to be a basic marketing resource for the future audiences development in the Korean dance festivals and the dance field.