The present disclosure relates to a power usage statistics method, a power usage statistics device, a power usage statistics system, a program, and a recording medium, and belongs to the smart home field. The power usage statistics method samples the measured value of the smart power meter and the state of the smart switch at a set sampling interval, and counts the power parameter group including the measured value of the smart power meter and the state of the smart switch. A step of acquiring a set, a step of specifying an average power of each smart switch based on part or all of several power parameter groups, and a step of specifying an operating time of each smart switch within a set statistical time; Identifying the power usage of each smart switch within the statistical time based on the operating time of each smart switch and the average power of each smart switch. The present disclosure can automatically statistics the power usage of one or a plurality of electric facilities controlled by each smart switch by using only one smart power meter and a plurality of smart switches. The number of uses of the data is reduced and the cost is reduced, and the complicated operation of reading the values and statistical analysis is omitted. [Selection] Figure 1
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