This chapter aims to explain why and how South Korea develop such an advanced information and communication technology (ICT) and e-government in short period of time, and how the public sector is being innovated by using various e-government services. Beginning with a brief introduction to South Korea, the author provides a historical overview of the developmental processes of South Korea's ICT and e-government. E-government systems and services available in South Korea are explained along with the major achievements in public governance innovation. Much of the e-government services provide efficient and transparent processes of public service provision, and citizen participation in policy making and politics is being increased over time. The combined effects of e-government systems and services are: convenient access to government services, fast responses to citizen demands, automatic digital record-keeping, increasing transparency, cost-effective service provision, active citizen participation in policy making processes, and increasing political activism. However, South Korean experience of building e-government still has problems to be resolved. Most problems are behavioral as well as cultural instead of technical.