Many factors affect the size of the shale gas development. First and foremost factor is how to establish the geological evaluation standards and select the core area of shale gas. In the early stage of exploration the optimized shale gas core area makes it possible to identify the target and to select the most favorable region for exploration. The main purpose is to find shale gas and achieve economic development. Based on the analysis of shale gas reservoir characteristics and the enrichment factors we discuss the organic-rich shale maturity, mineral content, gas content and conservation parameters in China. Learn from the U.S. shale gas exploration and development and research, combined with the new progress of China's shale gas exploration and development and research, we establish china's first shale gas core area parameter system and value standards. Finally, we optimize some favorable areas and core areas of the marine shale in southern China and point out Southern Sichuan Basin is the most realistic area for shale gas development.