As the new generation of information and communication technology，5G plays an important role in building network infrastructure of internet of things，promoting the deep integration of Internet，Big Data，AI with the real economy，and supporting the high-quality development of industry. 5G is a strategic area for priority development in the leading countries around the world. This paper summarizes the progress of 5G technologies and standards，analyzes 5G technology route，network evolution trends and 5G commercial status of major countries around the world，discusses the impact of 5G on the economy and society and its economic contribution to China.