Abstract: A smart home electric power connecting system comprises an electric power connecting guide rail and a socket board module. A slot is formed on the top surface of the electric power connecting guide rail, three conductive copper wires are arranged in the slot, and the three conductive copper wires are connected with a live wire, a null wire and a ground wire of a power source respectively. The socket board module can be inserted in the slot of the electric power connecting guide rail. The electric power connecting guide rail is arranged at the position of a skirting line, a power source bus system is extended to all rooms, the socket board module is capable of being inserted at any place provides available jacks for plugs of electric devices, and an available power source is provided for household appliances nearby.