Scott Joplin's style of music is known as Ragtime. It is a genre of music that originated in the late 19th century and was popularized in the early 20th century. Ragtime is characterized by syncopated rhythms and melodies, often with a march-like feel. It is usually played on the piano and is considered to be the first form of jazz. Scott Joplin was an American composer and pianist who was one of the most influential figures in the development of ragtime. He wrote some of the most famous ragtime pieces, such as 'The Entertainer' and 'Maple Leaf RAG'.