Abstract: For improving power quality of output of wind farm as well as economic efficiency of wind farm based on operation situation of grid-connected wind farm system, Gauss model and economic efficiency model of joint operating system of wind power generation and pumped storage were established, and a joint dispatching scheme of wind power generation and pumped storage based on multi-objective evolutionary algorithm of plant growth simulation was proposed. The simulation result shows that the scheme can improve not only power quality and smoothness of output power of wind farm, but also economic benefits and stability of wind farm compared with the optimization scheme of single objective.