Find out the hidden relationships in a large number of data. Big data allows abnormal data to exist, and it is more used in forecasting to find out the hidden relationships in a large number of data. A small amount of abnormal data will not affect the overall results. Big data refers to those data sets with huge data volume and complex data categories. This data set is a massive, high-margin and diversified information asset that cannot be transferred, managed and processed by traditional databases. It needs a new processing mode to have stronger decision-making, insight and discovery, and process optimization capabilities.