In modern urban public spaces,light interactive installation art not only beautifies the environment but also enriches people's emotional experiences through interactive design.Emotional design theory emphasizes triggering users'emotional responses through design to enhance user experience.This paper aims to explore the application of emotional design in light interactive installation art by analyzing various cases of light interactive installations.It reveals how emotional design impacts user experience at different levels and summarizes design principles and strategies suitable for light interactive installations to enhance the artistic value of public spaces and user experience.