Computerized accounting system should be composed of accounting system, financial management system and decision support system. From the accounting layer to the management and decision support layer, it can be carried out from several aspects such as accounts receivable and payable, fund management, financial indicator analysis and evaluation, and comprehensive budget management. Financial decision-making and forecasting are based on financial analysis to determine the direction and intensity of fundraising and investment, which are connected with management business subsystems such as material supply, finished product sales and inventory management, labor management, and finally integrated into the enterprise management information system.