Film category is the most basic image form of film. The reason for the difference of the basic types of films is that, as for the ontological characteristics of art, films use audio-visual language to form image narrative methods and attributes. Family movies, which focus on exploring family emotions, are usually simple and touching, concerned about society, introspective and reflective, and full of humanism. With objective lens to record the ordinary life of the characters in the play, taking the social hot events as the blueprint, integrating the director"s own understanding and feeling of life, magnifying the story of the little people in the big historical background, and infiltrating the philosophy and connotation of life into the description of the daily life of the family. Taking the short film His and her spring as an example, this paper analyzes and summarizes the influence of picture and sound design on film style from the aspects of work introduction, lens design and social influence. The core of the article is the impact of documentary style family films similar to his and her spring on the society, as well as the humanistic emotion and social care of such family films.