Database management method, data subscription terminal and data publishing terminal

The invention discloses a database management method, a data subscription end and a data publishing end, and the database management method applied to the data subscription end comprises the steps: receiving metadata sent by the data publishing end through an information link between the data subscription end and the data publishing end; verifying the metadata, and if the metadata passes the verification, sending verification passing information to the data publishing end and establishing a subscription relationship with the data publishing end; and receiving the subscription data and the subscription terminal security policy sent by the data publishing terminal, persisting the subscription terminal security policy to the subscription terminal database, and executing the subscription terminal security policy. According to the database management method disclosed by the invention, a publishing and subscribing mechanism is adopted, real-time perception of publishing and updating of data products among cross-dom