The science that studies the writing of music history and the changes of music forms in the past, such as the evolution, development and laws of music content and forms. It belongs to a branch of the whole research field of human cultural history, and it is a discipline juxtaposed with historical research such as literature, art and dance. The research center of music history is the development of professional music, folk music, secular music and religious music, which usually includes the following specific contents: (1) the music life and its evolution of primitive peoples in the world; Music situation of all ethnic groups and countries in history and in existence; The development of composing methods and theories; The origin, mutual influence and evolution of various genre forms; The historical development and evolution of musical instruments, playing music scores and playing methods; The historical development of vocal music and instrumental music; The artistic career of composers and performers, the style characteristics of their works and their influence on society; Superstructures such as social politics, economy, education, literary and artistic thoughts, the influence of ideology on music, and the study of music documents in various eras. Because the history of music covers a wide range, it is often inseparable from other disciplines of musicology. The task of music history is mainly to analyze and study the functions of specific characters and works in chronological order through specific historical events, expound their achievements, make certain evaluations, and try to find out the rules.