The invention relates to a system and a method of analyzing the influence of AC transient voltage on a DC control protection system. The system comprises an AC system transient voltage acquisition module used for collecting an AC system transient process, a characteristic parameter extraction module used for extracting the characteristic parameters of AC transient voltage according to the acquired AC system transient process, a DC system influence function acquisition module used for acquiring a DC system influence function according to the characteristic parameters, and a DC system optimization module used for generating the control protection logic and parameters of an optimized DC control protection system according to the DC system influence function. Compared with the prior art, the system and the method have the advantages of convenience, reliable analysis result, and the like.