Abstract: The reliability of SCADA system affects the micro-grid operation. The effective design of a Supervisory Control and Data Acquisition (SCADA) system for micro-grid including front-end processing module, communication gateway module and supervisory control module are presented in this study and then the micro-grid SCADA system is built. The actual micro-grid operation tests are performed using the SCADA system. The experimental results show that design and implementation methods of micro-grid SCADA system are practicable and feasible.