金融海嘯提供企業以最低成本進行併購的機會，企業藉此達到外部成長的目的，但併購案之綜效價值如何轉化成有意義的數值以幫助主併公司進行併購價格的評估是許多企業在進行併購時的疑問。 　　本研究的目的為運用企業評價中的EVA經濟附加價值法與實質選擇權法，來進行G公司收購N公司之併購價值評估。本研究利用EVA經濟附加價值法與實質選擇權評價法相互搭配，將各項決策所創造之彈性價值納入分析，更充分涵蓋併購策略的綜效價值。 　　研究結果顯示，若不考量選擇權彈性價值，則G公司收購N公司所付出之價格略高於EVA計算出之企業實際價值。加入了選擇權價值之擴充性，淨現值比收購價格高出很多，顯示主併公司在評估該收購案時，可能已考量策略彈性價值。 / Financial crisis leads to an opportunity for the enterprise to do mergers and acquisitions at the lower cost. The enterprise could achieve external growth by mergers and acquisitions. However, how to translate the synergy of merger into meaningful data to help acquiring companies evaluate the accurate acquisition price is a question for many enterprises during M&A. The objective of this study is to use the economic value added (EVA) method and real options method of enterprise evaluation methods to evaluate the acquisition cost of Company G’s acquisition of Company N. This study takes both economic value added (EVA) and real options method, including the analysis the flexibility value and further exploring the synergy of the M&A decision. This study includes that if the flexibility value of options is not considered, the premium paid by Company G acquiring Company N is slightly higher than the real enterprise value by EVA. However, if to include the flexibility of options value, the net present value is much higher than the acquisition cost, which may indicate that the acquiring company has taken flexibility value in to consideration when evaluating such M&A.