File stream-based internal and external network data synchronization method and system

The invention discloses a file stream-based internal and external network data synchronization method and system. The method comprises the following steps: firstly, obtaining an intranet data synchronization request, generating an XML file containing IP retrieval data according to the intranet data synchronization request, and storing the XML file in a first sharing request directory; then, regularly scanning the first sharing request directory, and synchronizing the newly-added file to a sharing folder of an external network system; the extranet system regularly reads the XML file in the shared folder for scanning and analysis, carries out global data attack, and collects detailed data of an IP specified by a user to generate a result data file; putting the result data file into a second sharing request directory; and finally, regularly scanning the second sharing request directory, analyzing the newly-added result data file, and displaying the newly-added result data file on the front-end platform of the in