In response to Kaohsiung’s prolonged and intense sunshine, the local government has managed to find the right amount of sunlight to enter the interior. From the design of the deep balcony, it has introduced appropriate light, filtered strong sunlight, and adjusted the natural light to reduce the use of air-conditioning and lighting equipment. The number of hours to achieve the benefits of energy conservation and carbon reduction. The Kaohsiung Municipal Government has implemented the Kaohsiung City plan to promote the design criteria of the landscape balconies. Through the design of shades or balconies, it can bring a cool living space. It is discussed through the influence of deeper balconies and deeper balconies in the case of the case. The purpose of this study is to analyze the influence of deep balcony and split-level deep balcony design styles on the indoor light environment, and to use computer simulation software DIALux to analyze and compare visual computer numerical simulations to design different types of balconies and spatial depths. The combination of changes in the direction of one-side lighting is the experimental factor, and the trend of indoor illumination distribution is obtained. Then the deep balcony and split-level deep balcony forms are explored. The interior light environment of the building is relatively good and bad, and it is used as a reference for the subsequent proposed landscape balcony design. in accordance with.