With the development of computer Internet of Things and big data technology， intelligence in the field of agriculture has gradually become the focus of research. This paper takes crop planting as the research object and builds a set of intelligent control system based on the big data technology of the Internet of Things. Through reasonable sensor node layout， efficient data acquisition and transmission protocol， powerful big data storage and analysis early warning platform， the characteristic data monitoring and data accumulation of the greenhouse environment are realized. On this basis， through the design and implementation of intelligent control algorithm， intelligent and scientific management of crops is provided， and agricultural production efficiency is improved.