With the rapid development of the digital economy and the deepening transformation of corporate finance, traditional financial information systems can no longer meet the demands of refined management and strategic decision-making. This paper addresses the pain points in the current digital transformation of corporate finance and proposes a project planning framework for a new financial digital information application system. The study first analyzes the development trends of financial digitization and the necessity of system construction. It then establishes a comprehensive planning framework from dimensions such as system architecture, functional modules, technology selection, and implementation pathways, while designing risk control mechanisms and benefit evaluation systems. Research indicates that by integrating emerging technologies such as big data, artificial intelligence, and cloud computing, this system can achieve automated processing of financial operations, real—time data analysis and control, as well as intelligent decision support, significantly enhancing financial operational efficiency and value creation capabilities. This study provides enterprises with systematic implementation pathways and theoretical references for advancing financial digital transformation in complex environments.