The invention discloses a peak shaving gap calculation and analysis method of an electric power system with wind power. The peak shaving gap calculation and analysis method of the electric power system with the wind power includes: establishing a peak shaving gap calculation and analysis platform; grading load levels; collecting and performing statistics on wind power output data; calculating peak shaving capacity of the electric power system with the wind power; calculating the maximum value of a peak shaving gap in a next day; performing peak shaving gap iterative computations under a K stage load level; calculating peak shaving gap probability and expectation under the K stage load level; calculating peak shaving gap probability and expectation in the next day. Concrete steps are shown in attached maps of an abstract. The peak shaving gap calculation and analysis method of the electric power system with the wind power solves peak shaving gap calculation problems of the electric power system with the wind power, and provides support to scheduling operation.