The monitoring system of large-scale wind farms is miscellaneous and independent, which forms information island with each system as its boundary in application, resulting in many problems such as low control efficiency, poor reliability and difficult operation and maintenance of wind farms. Based on the integrated technology of multiple modules, unified command control technology and power control technology,the integration of different functional modules such as power control, energy management and fan monitoring are realized, and the integrated monitoring system of wind power control is developed. And the monitoring system structure of the wind farm is optimized. Finally, through the field application, the reliability and economy of the system are verified.