This paper analyzes the factors on dynamic economic dispatch including wind farms. Environmental economic dispatch model including wind farms is proposed. Considering the thermal power generation cost, thermal power polluting emissions and low cost of wind power generation, the objective function is to minimize the total cost in system. Environmental economic dispatch including wind farm is studied with chaotic ant colony optimization algorithm which has advantage of strength searching capability and fast optimizing. Meanwhile, the application of the relative entropy balance theory is on evaluation and selection to the decision results. The simulation results show the model and algorithm are correct and effective.