In order to change the situation that horticultural plants are severely limited by natural conditions, people gradually apply computer and Internet of Things technology to an artificial simulated intelligent greenhouse to simulate the environmental conditions suitable for plant growth. In gardening, we can use this method to optimize plant growth and improve productivity. This paper analyzes the application of artificial intelligence system design based on genetic algorithm in horticultural cultivation, studies and discusses the artificial intelligence control system from two aspects of hardware and software, looks for the artificial intelligence control system with low market price, good quality and high performance-price ratio, and constructs an intelligent system platform suitable for horticultural crop growth.