The purpose of the study was to find whether Taiwan banks could gain competitiveness by using merger and acquisition strategies. After interviewing with nine experts who work in the banks, the study found that ¡§economies of scales¡¨, ¡§brand image¡¨ and ¡§human resource¡¨ were the key successful factors of the banking industry. The study examined three banking mergers that were announced after the Legislative Yuan had approved ¡§The Law of Financial Institution Mergers¡¨. The result was that the banks in these cases had few benefits by using merger and acquisition strategies. Therefore, standing at the point of banks and considering their abilities and resources, the study chose three merges as the objects of study. Then, the study investigated the merger benefits and integration problems in the three merges. The study found that mergers in Taiwan commercial banks could produce economies of scales. Taiwan commercial banks could not improve brand image and human resource by using merger and acquisition strategies. Most Taiwan commercial banks were lack of innovation culture and employees who were good at financial innovation. Taiwan is going to participate in WTO, so the combined banks needs to improve their brand awareness. The conclusion of the study was that merger and acquisition strategies could bring Taiwan banks some benefits. But Taiwan banks could not rely on merger and acquisition strategies to solve the problem of being lack of competitiveness. The integration differs because of different merger goals. The integration would influence the achievement of merger benefits.