Abstract: Wind farm construction and operation are dependent on the weather service. In the early days of wind farms, wind farms should monitor the wind resources and meteorological conditions in real time, and then assess the regional wind resources. In order to realize the regional wind resource assessment of wind farm, this paper designed a kind of multifunctional monitoring system of wind parameters. From the point of high reliability and strong expansibility, PLC is adopted as the core to design the hardware connection, data acquisition and monitoring interface. The monitoring system has user management, real-time monitoring, trend diagram, report display and alarm functions. The system is characterized by the acquisition of voltage and current signals, Modbus protocol signals with two monitoring methods of IPC and touch screen. The system uses the industry's common OPC server which is compatible with other systems of data information. Experiments show that: The system is fully functional, both in situ and remote monitoring, with good reliability and monitoring results.