Abstract: Currently, economic transformation,upgrading and electricity reform make a profound influence on China Southern Power Grid, high quality and efficiency and innovation-driven development are the intrinsic requirement of CSG. Using big data to enhance lean management, developing diversified are important subjects of CSG. The philosophical nature of big data was analyzed, and the driven force of development big data was discussed. The essence of power big data is "big data+power grid", and based on this the value and significance of power big data were discussed. A general framework of power big data was presented. Important tasks on the framework to develop big data were suggested. The general framework and tasks make certain significance to develop big data for CSG.