Every generation of wireless technologies needs to bring a set of new system capabilities to enable future applications and services, the sixth generation mobile system (6G) is no exception. This paper provides an overview of the technology transformation from the communication-centric the forth generation mobile system (4G) and the fifth generation mobile system (5G) to the compute-centric 6G with the cloud-native system framework as the foundation of the next generation technologies. We explain what 6G plans to achieve, the fundamental reasons for this technology transformation, the architecture framework and enabling technologies to achieve 6G cloud-native technology objectives. This paper intends to provide a technical deep dive on the 6G cloud-native system to trigger more discussions, innovations and bring the technology transformation from concept to reality.