The Internet is the most important global infrastructure nowadays. With the emergence of the importance of the Internet，traditional international relations extend to cyberspace. At present，cyberspace is in a critical period of order construction and rule game. Whether or not national sovereignty can be applied in cyberspace is the most complex and fundamental problem. This issue not only concerns directly the status and role of the state in cyberspace，but also closely links with the construction of Internet space order and international law system. The idea of the destiny community of cyberspace proposed by China provides a way of thinking for solving this problem.