TJCOS Tourism Factory is a third-floor building for providing the knowledge of cosmetics. Being an advocator of lighting the insight of cosmetics, the interior design of the entrance applied the concept of “cave” from Plato. A chiseled cave with choppy surface is shined by the skylight as the awareness of cosmetics. Wood material is used to present the warm grain of stone. Cosmetics beautify human as interior design acts as makeup for the building which demonstrates the value of the cosmetics tourism factory.