Abstract
Open Government is now a popular political movement in the world since Obama administration announced "Open Government Initiative". We examine how the open government and it's affiliation, open data policy are spreading world-wide. Then we compare the open government and open data policy. We propose the concept of Open Governance which expands open government in two ways. First, open governance changes positions of citizens to be a real master in the public sphere, traditionally government has been and still now government behaves as a lord. Second, it includes legislative branch in the government as well as administrative branch. And we show a maturity model for open governance. In both open government and open governance system, digital technology including Internet and Social media plays a vital infrastructural role.
