Because of the combination of different kinds of art and technology, multimedia design, compared with traditional media creation, has more rich and complex expression methods. Multimedia owns the overlap between time and space in deep virtual space, providing creative platform and various thinking angle for designers. Multimedia design includes a wide range of expression ways. Its dynamic quality, flexibility, vitality and narrative feature improve its value further. This paper analyzes the expression and reasonable application of visual elements in the media design process for showing the expression function of visual pictures, composition and color.