The political and economic reform in China provided an excellent opportunity toTaiwan’s business. Taiwan’s investment in China has built the dependence relationship of both sides on economy and trade. Small bank market and high competition in Taiwan, the memorandum of understanding (MOU)on cross strait banking andthe economic co-operation framework agreement (ECFA)signed by both sides opened the gate for Taiwan’s banks to invest in China. The investment of Taiwan’s banks in China not only solved the financing problem of Taiwan’s business there but also provided Taiwan’s banks an overseas investment opportunity. The research is to analyze the procedure for Taiwan’s banks to invest in China with product market matrix & following the clients, and propose some suggestions through document analysis and in depth interview. Taiwan’s banks should refer their competitive advantages and follow Taiwan’s clients to enter China’s market. Taiwan’s banks have to change their representative offices to branches or subsidiaries, and purchase equity or join strategic alliance for the opportunity in China. Furthermore, Taiwan’s banks should build the brand image and difference on service, and watch the development on the business of wealth management and personal banking. The mutual relationship of both sides on banking will move into the further stage, building the mechanism of mutual supervision on monetary will protect the investors’ rights and interests.