To present sufficient information for prompting a user to reduce the usage of electricity, gas, or tap water.
An electricity usage measurement device 1 transmits branch currents and a branch voltage detected in real time by a sensor part CTi from a control part 10 to a monitoring device 3. In the monitoring device 3, a data processing part 30 creates Web content for presenting the electricity usage (power usage) of each branch circuit, and a network communication part 31 distributes the Web content to a presentation device. Accordingly, the electricity usage used at a house is presented in real time to a user according to the Web content presented by the presentation device, so that it is possible for the user to instantaneously confirm the usage each time. As a result, it is possible to present information enough to prompt the user to reduce the usage of electricity, gas and tap water.
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