A cost control information communication method and system based on an electric system. The method comprises: an electricity use information main station (10) delivers a cost control instruction to a cost control front-end server (20); the cost control front-end server (20) compresses the cost control instruction, and then sends the compressed cost control instruction to an electricity cost control communication apparatus (40) through a satellite (30); the electricity cost control communication apparatus (40) decompresses the compressed cost control instruction and/or performs protocol conversion of the compressed cost control instruction, so as to generate a cost control instruction to be executed by an intelligent electric meter (60); the electricity cost control communication apparatus (40) transparently transmits the cost control instruction to be executed by the intelligent electric meter (60) to an electricity meter reading concentrator (50); and the intelligent electric meter (60) executes the cost control instruction allocated by the electricity meter reading concentrator (50). The scheme can bring the technical effect of providing an effective and accurate electric meter control function to an electric power information main station.