The invention relates to an electric energy meter capable of improving a communication distance. The electric energy meter comprises an electric energy meter body, the electric energy meter body is internally provided with a single-core bidirectional optical device, the single-core bidirectional optical device is connected with a plastic fiber, the electric energy meter body is provided with a connecting piece, a connecting portion is provided with a through hole, the plastic fiber is provided with a plug-in cooperating with the through hole, the plug-in is provided with a self-locking assembly, the plug-in is fixed in the through hole through the self-locking assembly, and the single-core bidirectional optical device is provided with an LED light source capable of generating green light. The electric energy meter has the following advantages: through arrangement of the single-core bidirectional optical device, the electric energy meter body can realize an optical interface, an integral all-optical network is formed, fiber to the home is realized, by taking the green light as a communication light source, the communication distance can be 200-300m, the communication radius demands of different districts can be satisfied, the plastic fiber can realize rapid accurate positioning, the onsite operation work efficiency is greatly improved, the operation cost is reduced, and the operation cost can be reduced by 95% compared to conventional operation cost.