IPv6 not only has massive addresses and supports identity traceability，but also has the ability to adapt to cloud-network integration and computing-network collaboration，such as sense service，flow detection，and segment routing. The rich programmable space of IPv6 still needs to be further developed. The Internet is now entering the leading period of the IPv6 protocol，and is accelerating the transition to IPv6 single stack. Global IPv6 is developing rapidly，and the large-scale deployment of IPv6 in China has achieved remarkable results. Promoting continuous innovation and deepening the application of IPv6 requires equal emphasis on technology and management，and the joint efforts of enterprises and governments.