The invention relates to an electric energy meter with a replaceable battery and an electric energy meter bottom. The electric energy meter comprises a meter body, wherein the meter body is provided with a printed board, a battery box is arranged on the meter body and comprises a battery box body, a cavity is formed in the battery box body and is used for a battery to be detachably installed from one side, a positive pole piece and a negative pole piece are arranged on the battery box body and are respectively and electrically connected with a positive electrode and a negative electrode of the printed board, and contact parts are arranged on each of the positive pole piece and the negative pole piece and are used for being contact with a positive electrode and a negative electrode of the battery. The cavity is formed in the battery box body of the electric energy meter and is used for the battery to be detachably installed from one side, the positive pole piece and the negative pole piece are arranged at two ends of the cavity and are respectively connected with the positive electrode and the negative electrode of the printed board, the battery is arranged in the cavity of the battery box and is in contact connection with the positive pole piece and the negative pole piece, and the electric energy meter normally works; when the service lifetime of the battery is due, the electric energy meter can be continuously used after the battery is replaced again, the problem that the service lifetime of the electric energy meter is shortened due to the fact that the battery cannot be replaced is solved, and resource waste is prevented.