This thesis presents an interpretation of Korean musical history based on an analysis of the choreography of each era. The development of Korean musical theatre can be divided into the following three ages. In the antecedent stage (1930s–1950s), the first musical production were like operas, but these were very different from Western musical theater. Korean traditional dance also remained popular. The dance themes focused on politics or parodied current events. The famous choreographers in this era were Kim Minja and Jang Chuhwa. In the development stage (1960s–1980s), Western influence on Korean musical theatre was pronounced. Commercial efforts were made to develop a music industry. Spectacular shows were produced, and these represented an attempt to target global markets. The famous choreographers in this era included Kim Bekbong, Lim Sungnam, Choi Hyun, and Bek Sungku. The golden age (1990s–2010s) brought dramatic change to Korean musical theater. While the original Korean musicals had been established as the basic form of musical theatre, Western musicals became a major branch in the Korean music industry. Each branch was a thriving institution, artistically and commercially, and each had its own place and purpose. The famous choreographers in this era included Han Ikpung and Seo Byungku. Korean musical theater has been a part of the dramatic presentations of the times. Due to the emergence of modern Western musical theater, many structural elements changed, and choreography in musical theater became an important part of productions.