Since the rapid development in aviation, flight safety has become the focus and many specialists have proposed programs to improve crew performance in flight environment. Dramatic improvements in flight safety have been made in the last few decade. Especially recent years, many theories of CRM have been developed. Hopefully, flight accidents will be decreased through the resource managenent among flight crews. The CRM training program starts with content setting. And then through constant practice and feedback, human attitude or behavior can be gradually modified by correct knowledge or procedures. The concept of CRM is not only applied in cockpit crews, but also in air traffic controllers. However, training of air traffic controllers and flight crews are different. Most of accidents resulted from bad communication among crews, especially between flight members and air traffic controllers. Therefore, it is apparent and important to set up training for air traffic controllers in order to maintain the accuracy and fluency of communication.