Since terrorist attacks on the United States in 9/11, the aviation terror has been rapidly reduced while having an enormous amount of expenses invested in the aviation terror prevention. The aviation terror indicates itself the problem, and by the same token, the aviation terror prevention requires a huge investment. However, the available resources are limited, which raises concern over the effective use of the limited resources. Therefore, in order to contribute to the establishment of effective aviation security measures, this study examines and analyses the aviation terror types and changes, with the forecast of the aviation terror types with high occurrence potentiality, and suggests the countermeasures for the aviation terror prevention.