Since its birth, movies have gone through a process from silent and colorless to sound and color. There are many movies without lines, sounds and colors, but there are almost no movies without music at all. Especially in modern times, music has become an indispensable part of modern movies. According to a large number of psychological and sociological studies, music has a significant impact on human emotions. A doctoral supervisor from Nortel once conducted an experiment in which he completely erased the background music when showing such films. As a result, within half an hour of the film being shown, a large number of viewers left the venue, expressing their inability to continue watching. It can be seen that music is indispensable and plays a significant role in movies.

In movies, many special scenes or characters’ psychological states cannot be expressed with lines. Appropriate music can provide a good guide and hint. Common characters appear in the film, and they often make fun of the character's every move, so the audience can clearly tell whether he is a good guy or a bad guy. Of course, with the development of movies, such simple processing techniques will become less and less common, but they remain the same. Music, as a special language, can play a role in revealing scenes and metaphorizing the psychology of characters in movies. In many series, a certain piece or type of music always represents a relatively fixed meaning. In other words, this or this type of music belongs to a special person or scene. For example, Ultraman, Zorro, Spider-Man, Superman, etc., almost all of them have their own representative music. Whenever the music starts, the audience knows that a certain character is about to appear, which serves as a foreshadowing.

Background music can enhance the atmosphere and guide and control the audience's psychological state. In the process of rendering the atmosphere and influencing the audience's emotions, it also gradually promotes the expression of the movie's theme, allowing the audience to interact with the movie, thereby highlighting the movie's theme in the audience's mind. A good film will leave a deep impression on the audience not only through the storyline and screen production of the film, but also as one of the important artistic elements of film and television works. Background music also plays an important role in the macro, micro and all-round aspects. , serialization, in-depth and high-level aspects play a role in promoting the effect of the film.