U.S. has always been a bellwether in the world in IT industry development and cyberspace governance. The strength in innovation and institutionalization represented the soft power of U.S. in Internet development and cyberspace governance. The overall characteristics could be specified respectively from the perspective of industry development and cyberspace governance. On one hand，frontier research output was provided with a smooth and accelerated access for industrialization. The burgeoning sectors such as big data，cloud computing and Internet of Things（IOT）has nurtured new growth engine，which was in the past created by traditional sectors such as telecommunication，IT，hardware and software. The Digital Economy Agenda released in 2015 constituted the blueprint for digital economy development in U.S.. On the other hand，the three strategic documents issued by U.S. government draws a basic framework for Internet safety and cyberspace governance in U.S.，characterized by comprehensive legal system，effective administrative institutions，advanced governance technologies，and coordinated participation of multiple stakeholders. In the past year，government-led round-table legal deliberation regarding Internet governance has extended to a series of emerging and controversial problems such as unmanned aerial vehicle，facial recognition system and mobile applications. The orthodox authority of US in international cyberspace governance has been challenged after PRISM. A compromised solution was therefore preferred to balance between national interest and international dispute，which resulted in the formal acceptance of ICANN stewardship transition proposal in June 2016.