In modern plant lighting, the status of LED lighting continues to improve with the progress of its technology.At the same time, the development of Internet of Things technology provides the possibility for its integration with lighting technology. Aiming at the current intelligent lighting system based on Internet of Things, this paper introduces the application background and trend of LED plant lighting, Internet of Things and LED intelligent lighting system, some existing design schemes and two key issues in LED lighting --light decay compensation and color mixing matching.