System and method of guiding use of electronic device

A system for guiding use of an electronic device, comprising:

• an output unit which provides a user with an interface;
• and
• a guide information providing unit which outputs guide information including a use time or an amount used for a first electronic device from a first time point to a second time point to the output unit,
• wherein the guide information is provided by separating a first power used amount for the first electronic device having a first correlation coefficient between a predetermined factor and a power used amount thereof, and a second power used amount for a second electronic device having a second correlation coefficient between the predetermined factor and a power used amount thereof, the second correlation coefficient being smaller than the first correlation coefficient, from power used amount information, calculating a first predicted power used amount for the first electronic device from the first time point to the second time point by using a prediction value of the predetermined factor from the first time point to the second time point, calculating a second predicted power used amount for the second electronic device from the first time point to the second time point, and considering a target amount of power used from the first time point to the second time point and the first and second predicted power used amounts.