Wind turbine output has characters of large volatility and strong randomness, and needs other equipment to coordinate under the traditional control strategies. The paper proposes and analyzes the working principle of a unit layer WT-AGC control strategy in detail. Considering operating state of wind turbine and requirements of wind farms, unit operating modes are divided into two ones under WT-AGC control strategy, which include the traditional operation of order higher than the maximum capacity and limited power operation of order below the maximum capacity of the unit. Through controlling the rotating speed of wind turbine and pitch-regulated mechanism, the steady output of wind turbine is achieved to meet the scheduling requirements of wind farms, which has been simulated by a real double-fed wind turbine. The results show the WT-AGC control strategy not only achieves output scheduleability of wind turbine, but also improves stability of wind power integration, which verify the validity of proposed strategy. This work is supported by the International Cooperation of Science and Technology Special Project (No. 2014DFG62530), State Grid NARI Technology Projects (the Wind Generator Intelligent Control) (No. SGTYHT/14-JS-188), and Science and Technology Project of Nantong City (No. BK2014028).