The utility model discloses a module electric energy meter. How to provide be convenient for production installation and the high intelligent ammeter of commonality, become present problem demanding prompt solution. The utility model discloses a drain pan and install electric energy metering circuit board and the module storage tank in the drain pan cavity, the module storage tank in be equipped with at least one and can pull out with electric energy metering circuit board and insert the module of being connected. Set up a module storage tank in this electric energy meter, the user can be based on the demand of oneself and select corresponding required module to the quick replacement to the module has been realized when the module goes wrong, user or producer can also be according to the demands of difference, the module and/or the IC -card groove of option demand, and this kind of structure has realized providing diversified the selection with the minimum cost for the user, has improved the commonality.