Movies are audiovisual art, and the eyes and ears are the two organs that receive information at the first time. One of the reasons why people sit in movie theaters and watch movies is to listen to the sound stimulation. Movies can develop from silent to sound. This is also people's demand for motion effects and sound, and they hope to have forms of expression other than photography and art. If you look at those Hollywood blockbusters, from the beginning to the end, a lot of music enriches the continuous development of the plot. Even when the movie has a certain tone, the music can enhance it. ”

Secondly, movies have multiple rhythmic functions, such as subjective rhythm, objective rhythm, director’s psychological rhythm, audience’s psychological rhythm, etc. Only the form of music and the film are very unified in rhythm. The art form is slightly worse. Music can express these rhythms through different musical rhythms and musical languages, catering to different styles and different scenes of the story. To a certain extent, music has a role in movies that no other form can. Substitute." Wang Liguang once conducted an experiment with his graduate students, showing them "Pirates of the Caribbean" while turning off all the international sound channels. Within 20 minutes, some people couldn't watch it anymore.

Music created for movies is an important part of the comprehensive art of movies. Its performance is synthesized into a sound track through recording technology, dialogue and sound effects, and is perceived by the audience as the film is shown. Film music is a new music genre that emerged in the 20th century. It has the general popularity of music but also has its own characteristics. It occupies an important position in the cultural life of contemporary people. The main characteristics of film music are the comprehensiveness of audio-visual unity. Film is basically a visual art, but the auditory element is also an indispensable and important auxiliary part. When film music is combined with other sound factors such as dialogue, narration, sound effects, etc., if it is properly matched with the picture, it can enable the audience to supplement and deepen the artistic experience of the film when accepting the visual image. If film music exists independently of the picture, it will lose its comprehensive function of audio-visual unity. However, particularly complete fragments can still be played and appreciated as independent musical works.

Movie music is music that embodies the artistic conception of the film in the film and is an integral part of the comprehensive art of film. It plays a special role in highlighting the lyricism, drama and atmosphere of the film. Film music has become a new modern music genre.