This article will discuss the questions about situation comedy in media age. Surviving as a kind of extension power, situation comedy is a characteristic production, which takes the video media as central in post-modernism period. Constructing by image, reality and ideology, the image-reality of Trinity built the existent mode, shapes and changes the mass and their daily life.Through the analysis to typical characters especially securing pattern of situation comedy, the view of cultural significance and cognition value to situation comedy as a kind of cultural type will expand in three ways, comedic, family-ductility, and V-effect. At the same time, the other analysis that the derivative relationship between situation comedy and contemporary Chinese cultural realities will be discussed by implying the theory of Public Sphere in it. As a ’outer point text ’ namely ’subsidiary text of wholly culture ’, situation comedy associates with mass ’ daily existence by correlation.