Mr. Akira Sasaki, Senior Managing Director of Toyota Motor Corporation, pointed out that hybrid technology is the technical core of sustainable development. Plug-in hybrid vehicles own the advantages of pure electric vehicles and get rid of their disadvantages, which is the most efficient new environment-friendly technology. Then he also introduced some problems met by Toyota Motor Corporation in the process of battery research and development. And he concluded that low-emission needed to adopt advanced technologies, but the cost of those technologies could not be too high.