In this study, the electricity consumption of an experimental building,Civil-Structure Building of National Chiao-Tung University, is analyzed. The results show that the total electricity consumption is reduced 30 million degrees from year 2008 to 2010. The main reason is that the intensity of laboratory usage is from high to low. Also, according to the electricity evaluation of year 2010, the percentage of electricity consumption of lighting system, air-conditioning system, computers,experimental apparatus and miscellaneous power apparatus is 19.44%, 46.75%, 7.87%,18.76% and 7.18% individually. Finally, the average annual electricity consumption of individual graduate student is 2552 degrees for the high usage, 1861 degrees for the middle usage, and 1170 degrees for the low usage.