Legal metrology and illegal functional hardware separating structure for electric energy meter

The invention discloses a legal metrology and illegal functional hardware separating structure for an electric energy meter. The legal metrology and illegal functional hardware separating structure comprises a metering core and a management core, wherein the metering core and the management core are subjected to data interaction through an SPI interface; the technical problems that change of otherfunctional parts, fault or failure of an existing electric energy meter easily leads to change, fault or failure of a metering part, remote online upgrade cannot be realized when an electricity market policy, marketing and customer demands are changed, and mass wastes are caused by frequency batch replacement or factory reset are solved; a technical solution of meeting the requirements of smart grid development and electric power system reformation on function extension and change of the electric energy meter is put forward for saving resources and reducing cost for change or upgrade of function demands of the electr