A power management apparatus includes a storage unit to store power rate levels corresponding to a plurality of power rates, and store display information corresponding to the power rate levels, a communication unit to receive power rates for each hour of each day from a power provider, a controller to confirm power rate levels corresponding to power rates for each hour of each day, and confirm display information for each power rate level, and a control panel unit to display the power rates for each hour of each day according to individual power rate levels, the displayed power rate levels being displayed as different types of display information. The power management apparatus allows the user to intuitively recognize the current power rate and the current power rate level, and predicts the future power rates and the future power rate level, such that it can establish an optimum power use schedule.