Method of controlling network system

[0017]Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings.

[0018]FIG. 1 is a view illustrating a network system 10 according to an embodiment.

[0019]Referring to FIG. 1, the network system 10 includes: a metering device (smart meter) 20 which can measure power supplied to a residential customer and the electricity charge of the power in real time; and an energy management system (EMS) 30 connected to the metering device (smart meter) 20 and a plurality of electric products such as home appliances for controlling the electric products.

[0020]Here, the electricity charge is measured based on an electricity rate. The electricity rate is high in a time period where power consumption increases steeply and low in a time period such as midnight where a relatively small amount of power is consumed.

[0021]The network system 10 is operated by a power management program made to efficiently mange electricity