For meeting the needs of the survey of agriculture environment communication in Hainan Province, an intelligent monitoring system was developed based on ZigBee which consists of four parts: wireless sensor networks, gateway, transmission network, remote monitoring center. A new type network structure which is composed of wireless sensor networks and the transmission network was proposed. This paper is devoted to explanation and illustration for our design of intelligent agricultural monitoring system. The system feasibility and superiority was verified in a simple star topology setup in a botanical garden in QiongZhou University. The sensor nodes can obtain the temperature, humidity and illumination information in real time, and then transferred to the remote monitoring center by the gateway via the transmission network. The test result shows that this intelligent agriculture monitoring system has the useful characteristics of low power consumption, low cost, large network capacity, flexible disposition, and minor influence on the natural environment. It has better actual application value.