Apparatus for measuring electric power usage by monitoring switch on/off

An apparatus for measuring electric power usage is provided to measure the amount of electricity by sensing the on/off of the switch and to measure power consumption of the electric lamp only. The apparatus is comprised of the electric lamp, the switch operation sensor(1), the switch operation collector(2), the DATA acquisition server(3), the DB server(4) and the web server(5). The switch operation sensor senses the electrical energy consumption time according to the On/Off of the individual switch connected to the electric lamp. The corresponding ID is inputted to the RFID tag and the switch is easily found in maintenance and repair. The DB server stores the information of the DATA acquisition server. The web server provides the electric lamp in the DB server through internet.