On a global scale，utilities，high-tech companies，the government and customers have begun to pay much attention to the potential of chemical energy storage technology. However，there are still many uncertainties in technology development，market and policy. Therefore，the industry faces lots of difficulties and challenges to achieve a large-scale application. Combined with China’s demand for energy storage power system，this article introduces the market size of chemical energy storage technology，market maturity and the road map. Also，the article will analyze domestic and abroad policies，and forecast the future development of energy storage under the support.