Abstract: The history of Acoustics is very long, but for modern Acoustics it was only started from the end of 19th century after Bell's and Sabine's works. Modern Acoustics in China was developed even later. The main contributions to the development of modern Acoustics in China of Dah-You MAA and his academic achievements were presented in this paper. It is shown that Dah-You MAA who is one of the founders of the normal mode theory and the modern Acoustics in China has played an important role in developing modern Acoustics. Some preliminary studies of MAA's scientific Philosophy and his social activities were discussed in this paper also.