“Rainbow House”, a public welfare transformation project for the lovely children with mental retardation. Inspired by “rainbow after storm”, this transformation decorated the spaces inside and outside the Rainbow House with warm and bright colors, with an implication to bring sunshine and rainbow to Peizhi School and enable the lovely children with mental retardation to be accompanied all the way of happy growth. The rainbow color adjusted and matched through design is not so bright and stimulating. It is hoped that the adorable children feel happy when seeing such bright and happy color.