This paper summarizes and analyzes the fact that existing smart meters and electricity trading mechanisms cannot truly realize real-time power trading, and real-time settlement is the key factor restricting the real-time electricity price and electricity trading mode. By taking the goal of realizing real-time measurement, real-time trading, and real-time settlement of electricity and also relying on the payment settlement and programmable features of e-CNY, an e-CNY smart electricity meter with an e-CNY wallet built-in is designed. Its hardware is composed of a metering core, management core and transaction core and its software is based on the GlobalPlatform trusted framework. A new mode of real-time power trading on both the power generation and sales sides is conceived. It is based on real-time electricity prices, real-time released smart price contracts of power generation and sale, and real-time settlement. The e-CNY smart meter and the new real-time power trading model proposed can effectively encourage power generation companies and power users to respond to power system commands by tracking price signals, to actively participate in grid peak shaving, energy conservation and carbon reduction, and contribute to achieving the “3060 carbon peak and neutrality goals”.