The cloud computing has emerged and become one of the most influential information technology (IT) development trends recently. The cloud computing can be used to enhance the operation efficiency and reduce the operating cost concurrently for firms in general and financial institutes in special. Albeit the cloud computing seems attractive to banking services from the aspects of cost minimization, service value maximization, and thus, competitive advantage achievement, barriers still exist for the introduction of cloud computing by banks. In order to enable the cloud based banking services, IT strategies should be introduced for overcoming the obstacles, including the security, system configuration, and other related issues. Based on the empirical study results by surveying an expert from one of the Taiwanese leading banks, the rapid deployment strategy, the multi-tenant technology, and huge data processing capabilities were regarded as the most important strategies.