Kodaly has made outstanding contributions in the collection and research of folk songs. Under his chairmanship, the Academy of Sciences collected a total of 100,000 Hungarian folk songs. The accompaniments he wrote for folk songs and the a cappella arrangements he made were of high artistic value. His scientific collection methods have received international attention. Theoretical works such as "On Hungarian Folk Music" have been translated into Chinese, German, English, Japanese and Russian. In terms of composition, almost all genres are involved, but vocal works account for the largest proportion. The characteristic of the creation is that it can grasp the essence of Hungarian folk songs and portray the Hungarian national spirit and style. Therefore, his works were once praised by Bartók as "the expression of the Hungarian soul". His representative works include the singing drama "Harry Janos", the choral works "Hungarian Psalms" (1923) and "Budavar Praise" (1936) accompanied by orchestra, and the orchestra works "Galanta Dance" (1933) and "Peacock Variations" (1939), a cappella "Landscape of Materau" (1931), "Jesus and the Merchant" (1934), etc. In terms of music education, Kodaly also made outstanding contributions: he not only trained many well-known musicians at home and abroad, such as F. Saab, G. Shorti, B. Saborchi, etc., but also popularized music education and improved the people's consciousness. Remarkable achievements have been made in music cultivation. His training materials were compiled into a monograph by P.M. Young and named "Kodaly Teaching Method", which was tested and promoted around the world. In addition, he also made many achievements in music history, folklore, linguistics, literary history, etc.