With pointing out the challenge which the current electrical energy meter market was confronted with, a solution of energy meter based on SOC silicon was introduced, which featuring low cost and high performance. The components and design theory of the system, the hardware design, and the software flow was described in detail. The system applied MSP430F6736 which integrated with management, LCD display, RTC and measurement as the CPU. It provides high accuracy and time sharing measurement, LCD display, data storage, load and event record, and load control. Besides, it has RS485 communication interface which was used to read measurement data and status information following meter communication protocol. It was proved that this solution could perfectly satisfy the requirement of energy metering. With its high quality-price ratio it has wide market value.