The lighting design of outdoor building projection is a very important step in the process of landscape lighting, which is the process of integrating technology, art and reality. Through artificial design and creation, the sound, light and electricity are integrated into the architectural structure and landscape reality. Outdoor architectural projection enriches the cultural life of the city and brings closer the relationship between man and nature. As the outdoor building projection extends the time for visitors to visit at night, it provides a diversified experience and further promotes the development of the economy.