With the advent of the information age, the function and value of information begin to be fully understood and used by people. As a comprehensive sector of the national economy, banks need to use advanced management system to improve their service ability and service efficiency if they want to maintain their competitiveness and expand their profitability in the fiercely competitive society. This design system uses cross-platform Qt Creator as the system development tool, builds the interface of banking system on Qt Creator, adopts C/S architecture, uses Mysql database to store the managed information and the data are added, deleted, modified and checked. The system is mainly composed of teller interface and client interface. The Banking business mainly includes the functions of opening an account, depositing, withdrawing, transferring, inquiring the balance, etc., which realizes the basic business management of the bank and can accurately and timely display the required information to customers.