The generation compartmentalization and aerial combat capability of fighter aircraft were studied. A concept and its calculation method of asymmetry were put forward in the environment of systemic aerial confrontation. Based on the physicaldescription and mathematical models involved in systemic confrontation, the definition of battle superiority parameter under an asymmetrical condition was expanded. With the analyses of several typical campaign scenarios, i.e. a symmetrical, an asymmetrical and a supreme asymmetrical confrontation, by using of combat simulation approach, the issue of relationship between quality and quantity of fighter aircraft weapon systems was discussed. The research results show that the analysis taking into consideration the influence of asymmetry is more approximate to the essential current warfare. It is concluded that the inferior position on the quality side will be hard to be made up with superiority on the quantity side if the quality gap is quite big.