The article studies the growth environment conditions of tea and puts forward a wireless intelligent monitoring system for plastic tea greenhouse. According to the environmental requirements of tea tree, this article firstly defines the environmental parameters for planting tea in the greenhouse, and then designs the hardware and software of the intelligent monitoring system of tea in the greenhouse, and finally concludes the characteristics of this system. Through the practical application in tea greenhouse, the system decreases the cost and workload of tea planting and improves the quality of tea so as to enhance the economic returns.