Fecha de publicación: 04/07/2023 Fuente: Wipo "BigData" The invention discloses a decision analysis method and system based on big data, belongs to the technical field of information technology processing, and aims to solve the technical problem of how to improve the scientificity and accuracy of enterprise decision of a management department by using a big data technology. According to the technical scheme, the method comprises the following steps of: sorting, classifying, mining and refining converged full-quantization enterprise data, establishing an analysis index, and constructing a data index system; an analysis model is constructed, multi-dimensional visual analysis is carried out on enterprises in a region, meanwhile, the method is applied to self-service decision analysis of different users, various analysis indexes needed by management decision are provided for different departments and post personnel, and various decision demand scenes are supported; the method specifically comprises the steps of enterprise data acquisition; decision data management; building a data index system; and carrying out self-service decision analysis.