As the changing of Family structure, young people move out for studying or working, the previous structure is out of date and it can't commensurate with the demands of modern people. Be distinguished from the interior design of the previous structure which emphasis on living and dining areas, the new design expecting people are able to have a private space of their own. Considering the differences of daily routine and demand with three-generation, multi-function interior design is able to meet the needs of all generations.