The purpose of this study is to gain insight into the composition and expression system of Bae Myung-kyun Sanjo Dance by grasping the occurrence and development patterns of modern and contemporary Sanjo Dance. Literature review and analysis of previous studies were conducted as a research method for this, and intensive interviews were conducted with Hwang Hee-yeon, a direct disciple, as a way to compensate for the lack of previous studies. Bae Myung-kyun's Sanjo dance constitutes a unique dance that expands the range of expression around each part of the body based on the understanding of Sanjo music that accommodates various rhythms. As a result of analyzing the expression system, first, synesthesia based on understanding of music, second, descriptive techniques of pictorial image and visual expression, third, it is presented as a narrative structure added to the imaging of inner images. In addition, the completion of the form has improved artistry with an aesthetic characteristic that emphasizes that human inner beauty should be the basis. Based on the results of this study, which interpreted the composition and expression system of Bae Myung-kyun Sanjo Dance, we hope that research on illuminating the art world of Bae Myung-kyun will continue, and further progress into research on exploring the characteristics and artistic values of various Korean Sanjo dances.