Science fiction film is a kind of film, which takes science fiction elements as the theme and fantasy scenes based on science as the background, and develops narrative film and television works on this basis.

The scientific theories used in science fiction films are not necessarily accepted by the mainstream scientific community, such as alien life, alien planets, superpowers or time travel. Science fiction movies are often set in the possible future world, showing the difference between reality and spaceships, robots or other elements beyond the times.

Many sci-fi movies will show concern for political or social issues, as well as philosophical content such as discussion of human situation. Some sci-fi movies are adapted from sci-fi literature, but they will focus on extracting literary or humanistic elements, ignoring the scientific rigor and logic that sci-fi literature pays more attention to. The two cannot be compared, and the same standard cannot be applied to science fiction and science fiction movies at the same time.