The invention discloses an electric power marketing system based on the Internet of Things technology. The electric power marketing system successively comprises a bank system, an electric power marketing master station system, a GPRS (General Packet Radio Service) network, a concentrator, an interaction device, an Ethernet and user intelligent equipment, wherein the concentrator carries out data interaction with the electric power marketing master station system and the bank system through the GPRS network; the interaction device is in connection communication with the concentrator; and the user intelligent equipment receives data from the interaction device through the Ethernet. The electric power marketing system realizes the facilitation and the intelligentization of prepayment electricity purchase, truly realizes human-computer interaction, greatly improves the satisfaction of clients, has a favorable market prospect and can bring huge economic benefits after being industrialized.