To meet the ever growing demand for the ability to control large-scale power systems，a brand new conceptual model of the next generation system，named operation smart system（OS2），is proposed.The top-level application of OS2is designed as the power system operation cockpit（POC）.The concept and design of POC are described first，and the related technologies of key performance indicator（KPI）system design，panoramic modeling，remote calling of the user interface，and the smart gateway are then discussed in detail.Pilot applications demonstrate the feasibility of the design and technologies.