Louis Kahn said: “Without natural light, there is no life in a space.” Following the path of the history of architecture, we can see that natural light has always been an important part of architectural design. The atmosphere of the architectural environment is a group of various spatial functions. Light produces different effects according to the space, not only to respond to the principles of biology but to people’s psychological needs. In the atmosphere composed of light, shadow modelling is also important, as there can be no spaces without shadows. The role of light and architectural shadows is to make the space come alive.