Implementing anti-money laundering and countering terrorism financing has the legal Interests of fighting crime and maintaining financial stability, while customer due diligence is related to the strength of subsequent mitigation procedures of money laundering and terrorist financing risk. However, due to the lack of the coordination in national regime of law to prevent money laundering and combat terrorism financing, the banking Business is restricted by the protection of personal data when verifying the identity of natural person customers, and cannot directly retrieve the personal data of the criminal records or published judgments about adverse media entities suspected of being involved in money laundering or economic crimes. In addition, when verifying the beneficial owners of a legal person, since the lack of definition of the beneficial owners in the amendment of Article 22-1 of the Company Act in 2018, financial institutions also have no independent ways to verify the accuracy of the beneficial owners. Both above are not conducive to the fulfillment of the obligation of preventing money laundering and combating terrorist financing in banking business. This study will try to discuss the problems and make suggestions.