The invention discloses a miniature smart circuit breaker and an integrated electric energy metering and remote interaction system thereof. A switching power supply module, a master control unit MCU, an automatic reclosing module and a broadband carrier communication module are integrated into a circuit breaker body; after the automatic reclosing module receives a trigger signal of the master control unit MCU or the automatic reclosing module receives a remote opening command signal of a user in an automatic control mode, a drive circuit drives a DC motor to drive a gear drive mechanism to move, and a trip device in the circuit breaker body is pushed to be automatically opened; and the circuit breaker body carries out data communication with a concentrator of a court through the broadband carrier communication module by adopting a power line broadband carrier communication mode. The miniature smart circuit breaker is conducive to improvement of the feasibility and the enthusiasm that a user participates in a power demand side response, reduction of the difference between peak and valley load of a power grid and improvement of the energy-saving level of a residential building, is high in economical efficiency, is suitable for the occasions of power demand side management, contract energy management, building energy consumption management and smart city construction, and has a good application prospect.