With the increasing of wind power installed capacity， peak load regulation and transmission capacity have become main restrictions for accommodation of wind power. In order to provide an intuitive demonstration on the accommodation of wind power and guidance for the planning and dispatching of wind power， this paper presents a method for predicting the accommodation of wind energy considering peak load and transmission regulation. Based on the present condition of the gird， construction of power source and the actual operational data of the northern provinces of China with rich wind power resource， this paper analyzes and predicts two provinces available capability of wind energy in the target year under different scenarios. At last， this paper gives advices to improve the capability to connect wind power.