本文利用模糊理論與賽局實質選擇權法推導航空公司之領導者與追隨者的購機模糊決策價值與購機模糊決策門檻植。研究結論如下：與領導者與追隨者之購機模糊決策門檻值呈現正相關參數為波動度，無風險利率及投資成本，而呈現負相關參數為瞬間成長率。

We derived the purchase airplane decision values and purchase airplane fuzzy decision thresholds by fuzzy set theory and real option game methods for leader and follower in airlines. Then, this paper to evaluate the decision variable effects on fuzzy decision thresholds for leader and follower by numerical analysis and sensitivity analysis. The conclusions of this paper are as follows: volatility, investment cost and risk-free interest rate has the positive relation with the decision thresholds. The instantaneous growth rate has the negative relation with the decision thresholds.