Fuente: Wipo "BigData" The invention relates to the technical field of enterprise business co-processing, in particular to a cross-department government affair big data business co-processing method based on data fusion. According to the technical scheme, the system comprises a cooperative processing system, and the cooperative processing system comprises a basic module, an information acquisition module, a storage module, a networking module and a data fusion module. According to the invention, multiple government affair business schemes in the Internet can be integrated through the cloud big data module depending on the high computing power of the Internet, and the government affair business schemes with defects calculated by the cloud big data module are modified through the modification module. The risk estimation module intelligently learns multiple government affair service schemes in the Internet, and performs risk assessment on the schemes modified by the optimization module, so that the government affair service schemes are more fit for the trend of the Internet large environment, and then the strategy execution module cooperatively executes the schemes submitted by multiple departments, so that the government affair service schemes can be optimized. The function of intelligently fusing government affair business schemes according to big data is realized.