In this paper describes a system that can monitor the energy usage of multiple loads through wireless communication in a low voltage distribution panel. These are basic data that can increase the efficiency of energy use of buildings and factories. However, the method using wired communication is expensive to construct and maintain. Instead of such wired communication, wireless communication is easy to install and expand can be an alternative. In this system, a measuring system is installed at each lower part of the distribution panel to measure the energy and a monitoring system capable of collecting and transmitting the measured values by wireless communication is constructed.