At present, the energy saving in residential buildings becomes an issue through the world. For this energy saving, accurate analysis and prediction for energy consumption pattern should be preceded. Therefore, this paper is drawn up a Load-Profile through the energy consumption pattern in residential buildings, especially in an apartment which accounts for 60% in residential buildings. As the daily operation pattern can decide system performance, it is important to collect accurate hourly energy consumption of the apartment building. Accurate data were collected by conducting survey and actual measurement. For the survey, general items and data sheets were used to collect the power consumption and duration of home appliances and lighting equipment usage every 10 min. To measure the entire power of the sample household, Yokogawa CW240 Clamp-on Power Meter was installed in the watt meter. In addition, a standby watt meter; HPM-100A from AD Power; was used to measure the home appliances power consumption. As a result, the patterns in weekdays and weekend are different and for the appliances are different as well. Based on this result, the calculation formula for the amount of electricity used per housing unit is deduced. Also, the consumption pattern prediction is implemented using ARIMA model. By demonstrating the usage of electricity, understanding the tendency and preparing load profile standard. Through this research, household should reduce peak-load during daily life. (C) 2014 Elsevier B.V. All rights reserved.