A method for counting electricity consumption includes obtaining a plurality of groups of electricity parameters. Each of the groups of electricity parameters includes a reading of a smart electricity meter and corresponding statuses of smart switches connected to the smart electricity meter. The method also includes determining an average power of at least one of the smart switches according to at least one of the plurality of groups of electricity parameters, determining a working period of the at least one of the smart switches within a set counting period, and determining an electricity consumption of the at least one of the smart switches in the counting period according to the working period and the average power of the at least one of the smart switches.