Abstract: “Financial big-data” and “big-data for finance” are two concepts with different connotations,for which it’s necessary for us to distinguish the difference between them so that we can find out the information resource which functions in the process of human financial choice-making with structural analysis of the “financial big-data”, so that we can demonstrate the affect brought by the aggregation of the big-data, internet and AI on remodeling the financial behavior, with the dynamic analysis of the “big-data for finance”. As to the big-data for finance, the research and investigation for that, no matter what we focus on-its operation process or application scenario, should involve the analysis of the financial implementation platform and configuration of technical condition, as well as the analysis of the development process of big-data for finance which is driven by artificial intelligence like cloud computing and rote learning. In summary, on the basis of the investigation of the form of the financial big-data, with the research of the big-data for finance, this paper strive to reveal a possible and general mechanism of prospective human choice-making in finance.