Industrial gateway and data management method thereof

The invention discloses an industrial gateway data management method which comprises the steps of: acquiring residual capacity of an industrial gateway data storage unit, and when the residual capacity is smaller than a first threshold, deleting reported data in the data storage unit and only retaining unreported or reporting failure data; and detecting the residual capacity of the data storage unit again, when the residual capacity is greater than the first threshold, keeping a data write-in mode as a first write-in mode, or selecting a corresponding write-in mode according to a range of theresidual capacity and switching a data write-in mode into the selected write-in mode from the first write-in mode. The invention also further discloses an industrial gateway which not only ensures integrity of data to the greatest degree, but also ensures optimal use of a limited gateway storage space and is beneficial for ensuring stable operation of a gateway service and reducing investment of gateway hardware cost in a