Both domestically and internationally, changes in the administrative environment make innovations in public sectors essential for the sake of survival. Since its beginning, Roh administration has tried government innovations across the board to make the government more competitive, responding to the demands. What makes Roh administration's government innovation distinctive from the previous administrations is that the former more focused on the human resources while the latter concentrated on the hardware such as downsizing and functional adjustments. There have been three phases in the process of Roh administration's government innovation with it changing in its orientation in the course of action. In Phase One, or innovative base-buildup period('03-'04), it focused on suggesting its innovative roadmap, setting up the reform system and introducing the concept of change management. In Phase Two, or implementation and expansion periodt('05). it focused on implementing assignments for reform for innovative leadership and strategic management for government innovation. In Phase Three, or internalization of innovation periodt('06). it concentrated on institutionalization, internalization, innovative culture, assessment based on performances, policy quality control, and citizen's confidence in government innovations. According to the result of the government innovation management assessment, the overall central government innovation level increased from innovation level 3 to level 5 on the average with 51% of the government's institutions being innovation level 3 in 2004, 52% reaching innovation level 4 in 2005, and 48% reaching level 5 in 2006 again. This result shows that even though it was just a simple process improvement in the beginning, innovative culture rooted in finally at the end of the Roh administration's government innovation. However, it is for sure that the speed of level-up slowed down in 2006 compared to that of 2005. The limits of Roh administration’s government innovation and their reasons are as follows; Even though it is not denied that Roh’s innovation bore fruit in a different perspective from the previous administrative reforms, the speed of innovation slows down as the innovation goes on, with resistance growing and innovation wearing out. Even aggressively innovative institutions come to a standstill at level 5, facing the barrier to internalization. the reason for this is that the current reforms are control-oriented, punitive, driven by external forces and too much focused on reforms that are biased, severed and assignment-oriented. To put it another way, it is a top-down innovation rather than a voluntary one. Besides, by bringing up a whole new innovation assignment and strategies on an annual basis, innovation was lacking in its continuity. This causes deadlock, regression, and even a U-turn without internalized or voluntary innovation and measures should be taken to secure a voluntary driving force rather than an existing external force. Absence of the price mechanism in the public sector causes a failure of the administrative reforms or at least makes the performances poor. Roh administration's government innovation took the same course of action by neglecting to devise an automatic reward and punishment mechanism like the price, revealing its limits in the continuity and internalization of innovation. Also, Roh administration's government innovation deviated from its original cost-saving purposes, aiming at creation of values, which made the innovation burdensome and caused the expansion and waste of the innovation budget. One of the characteristics of the Roh administration's government innovation is the introduction of the various management skills from the private sectors and their application. However, it experiences failures and side-effects, failing to properly apprly apply them, which is because it experimentally adopted various models utilized in the private sectors without the support of the theoretical base and their verification. Models poorly based on the theory may lead to a failure in the continuous and internalized innovations. Chances are the model may succeed by coming up with an innovation mechanism such as competition equivalent to the price mechanism and applying theories to it. Roh administration opened a new era by differentiating itself from the former administrations. However, the mechanism of punishment, incentive and rewards should be adopted in the long run to internalize innovation in the public sector and secure the innovative culture. Of course, not only the application of this mechanism but also the adoption of models that are theoretically based and verified is needed.