O2O is a combination of online and offline. It has four impacts：overlay，integrate，transform，and enhance. In 2014，O2O achieved further development in China. Through temporal and spatial reconstruction，it brought revolution and innovation to traditional industries，expanding channels of marketing and introducing new shopping experiences. In the future，O2O penetration into traditional industries will intensify. Its entrepreneurial threshold will be higher. Its resource integration will be more difficult. Competition will intensify.