In this study, we start the research from the improved design of cheongsam in film and TV dramas and reconstruct the best element selection scheme of cheongsam design in film and TV dramas in line with modern aesthetics, taking the beauty, comfort and popularity of modern costume style as the benchmark. The preliminary construction of cheongsam design elements through the literature method and the Delphi method were used to collect experts' opinions on the design of cheongsam in film and TV dramas. The positive coefficients of experts were all higher than 80%; the authority coefficients of experts were all greater than 0.8; the Kendall coordination coefficient test was used to study the evaluation consistency, and after three rounds of expert consultation, it was found that the Kendall coordination coefficient test showed significance (p=0.000<0.05) in the relatively stable coordination coefficient of experts' opinions, implying that the evaluations of the 11 evaluators were correlated, which indicates that the evaluations are consistent. The best element selection scheme of cheongsam design in film and TV drama constructed by Delphi method has certain reliability, which can significantly improve the design efficiency and provide some reference for the innovative design of cheongsam designers.