At the stage of big data, the concept of data extends infinitely. As long as it can be described by the 0 or 1 symbol, and can be recorded and recognized by the computer, it can be called data. The types of data have greatly expanded. In addition to structured data, there is also a huge amount of unstructured and semi-structured data, including documents, blog posts, audio and video, images, GPS positioning data, social software data, search engine search records, Web browsing data, mouse browsing track records, various e-commerce records, etc., all network behaviors are used as information and included in the scope of statistical analysis, which directly leads to the complex data types of big data.