K Kapuk Factory is one of the factories which consists of a special factory for electrical panel wiring process and one office building from Legrand Group Indonesia which is located at the Pantai Indah Kapuk Industrial Center, Jakarta. Supported by the roadmap of the objectives of the Corporate Social Responsibility (CSR) of Legrand France (Headquarters), the implementation of ene,rgy management is expected to begin planning in early 2022. This study aims to assist the design of a smart power monitoring installation ilev using the Legrand CX3 EMS based ebserver at the Kapuk Factory in order to start planning the efficiency of the ene gy management syst . The results of this monitoring installation design design have been successfully in talled by testing the measurement monitoring function, control function module, status indicator also functioning and it is known that the current value obtained from measurements with the CX3 EMS Module and Webserver is 0.1-0.2 unit value smaller from the measurement results with the Clamp Meter.