As business environment today is ever challenging, agility and eficiency are the key success factor for an enterprise to prosper Particularly, as the information systems concerning semiconductor manufacturing have been increased the complexity and expanded the size, the role of IT gets more critical for creating effective and streamlined process. Therefore, IT is not a just technological issue but a driver for business renovation. Accordingly, IT governance should be dealt with as a business strategy and thus deserved senior management attention. Efective IT governance ensures that IT is aligned with business goals and delivers maximum value. Hence, the IT governance would be groundwork for company decision making. To attain such objectives, IT organization must peform diverse internal (Inside of IT organization) and external (outside of IT organization) activities for enhancing IT organization 's eficiencies. Among activities, setting and controlling a well-dejined, robust set of IT standard are the foundation for effective IT governance. This paper focuses on the representative interna I improvement activity; IT standard, and explores the effective IT governance pe$ormance by the IT standard Improvements at Samsung Electronics Semiconductor Business. It has been proved how efective the comprehensive control of IT standard influence on the eficiency of IT organization.