The invention discloses a cost control information communication method and a cost control information communication system based on an electric system. The method comprises the following steps: sending a cost control instruction to a cost control prepositive server by an electricity information main station; performing compressing treatment on the cost control instruction by the cost control prepositive server, and then sending the compressed cost control instruction to an electricity cost control communication device by a satellite; performing uncompressing treatment and/or protocol conversion treatment on the compressed cost control instruction by the electricity cost control communication device so as to generate a cost control instruction to be executed by intelligent electric meters; transmitting the cost control instruction to be executed by the intelligent electric meters to an electricity meter reading concentrator by the electricity cost control communication device; and executing the cost control instruction which is distributed by the electricity meter reading concentrator by the intelligent electric meters. By the method and the system, the technical effect of providing effective and accurate electric meter control function for an electric power information website is achieved.