The development of intelligent agriculture and the technological innovation of traditional planting industry are the core issues of the development of agricultural informatization in China, and the important way of the development of agricultural modernization. Soilless culture is a new crop cultivation technology that cultivates crop cultivation plants with a substrate (nutrient solution). The advantage of soilless cultivation technology is that it can overcome the obstacles of soil continuous cropping and prevent a large amount of water infiltration and loss. The Internet of Things technology is applied to soilless cultivation technology to realize the three functions of intelligent monitoring and management of crop growth environment, intelligent agricultural information collection and intelligent alarm. Automate crop management to maximize the productivity of crop production. Digital twin technology simulates a panoramic view of the plant, optimizes the workflow of the smart greenhouse, and improves the efficiency of crops from production to marketing. Realize smart farming and enter the post-'Internet of Things agriculture' era. The Niagara Internet of Things open distributed application development framework is used to develop an intelligent management system, and a 3D simulation environment is built to simulate the daily work flow of the greenhouse through the Thingjs. The intelligent management system mainly realizes the following four functions: intelligent information collection] Improve the means of collecting agricultural planting information. The use of intelligent sensor related technology can collect and sort out crop growth index information such as soil moisture, ambient temperature, and light, which can more effectively promote the growth of agricultural products, reduce the loss of agricultural products caused by natural disasters, increase crop yields, and increase economic benefits. Intelligent Agricultural Management] Improve the efficiency and quality of agricultural planting information processing. The Internet of Things and other intelligent control technologies are applied to process the collected agricultural planting information, and complete the monitoring of water resources, nutrient solution PH value, light conditions, environmental real-time temperature and humidity, CO2 concentration, and diseases and insect pests in the soilless cultivation ecological environment. To achieve the effect of improving the growth environment of crops, avoiding natural disasters, to a certain extent, and increasing the output of agricultural products. intelligent alarm] In view of the growth indicators that are not suitable for the growth and development needs of crops in the process of agricultural planting, the corresponding alarm and early warning operators are given immediately to improve the growth environment indicators of crops in time. Comprehensive supervision of the crop growth process to meet the needs of the public for high-quality, healthy crops. digital twin visual simulation]