This paper tries to discuss the thought of the music aesthetic of the Music-Fu in the Dynasty of Han-Wei-Jin. This discussion expresses these Music-Fu writers how to describe the sound of music instruments. They used a lot of words to express their feeling about music. We can find the different music aesthetic thought from these writers in three periods. This paper divides into three sections to analyze the viewpoint. First, the paper introduces the Music-Fu in the Dynasty of Han-Wei-Jin. Second, I try to analyze the context of Music-Fu. The end, I conclude that the writers how to realize the essence of music, and express their conceptions of the thought of music aesthetic.