The invention provides an account set maintenance and management system, which comprises eight modules: a database, a user register module, a login module, a service management module, a contract management module, an account keeping module, a statistics module, a synchronization module and an automatic reminding module, wherein the database, the login module, the contract management module, the account keeping module, the statistics module and the automatic reminding module realize synchronous data docking through the synchronization module; and the automatic reminding module can regularly remind a user to input required information according to reminding information and reminding date options input by the user in a setting interface. The system can monitor company and account informationin real time, can clearly display customers who do not pay the payment on time to carry out corresponding measures to recover the payment, and meanwhile, greatly increases data timeliness, accuracy and feasibility of finance management; and through reasonable configuration of the modules, the system can reflect information of customers with insufficient funds in time, thereby improving fund monitoring and operation capability.