The purpose of this study was to examine the process of policy changing in the Department of Music in the School Arts Education Promotion Plan, a document issued by th Ministry of Education from 2011 to 2020, and to find problems and improvements. As a Result, until 2015, the focus was mainly on quantitative growth by increasing th number and amount of schools supported, but after 2016, qualitative growth such as music programs, student satisfaction, and teacher education was pursued. Background of the initial policy began with the cultivation of personality for social requirement, then shifted to the student’s artistic value recognition. It expanded from the center of the orchestra to the musical, theater, art club, and art school. On the mid-term, the accumulated music and arts infrastructure was used to record musical development and established a system for business consulting. After the policy review, problems of mixed support for new and self-sustaining schools, consumer-focused music education, and musical instrument-biased support appeared. In order to improve these, it was confirmed that long-term planning and budgeting, support for various music areas, and mutual efforts of the Ministry of Education and the teacher group for music programs were necessary.