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Nowadays minimum circuit breaker (MCB) is used for residential distribution line monitoring and protection, not supporting electric energy metering or automatic open-close control for multi-circuits. A design scheme of smart minimum circuit breaker integrating electric energy metering and remote interaction is proposed to improve intelligentization and communication level, which also contributes to decreasing house energy consumption. The smart MCB consists of circuit breaker, switching mode power supply, sampling circuit, auto-reclosure, display screen and so on. Metering, storage, display and upload of multi-circuits electric energy data as well as load curve, are available by “primary-branch” structure based on RS-485 bus. Users are able to communicate with household smart MCB in long distance by service station and concentrator based on power line broadband carrier. Electric energy data query and remote open-close control of selected home circuits are achieved, which is helpful to promote house energy conservation level, indicating a wide application in building energy consumption management and electric power demand side response.