With the advent of the era of network information technology, the construction of university financial management information platform has become an important research topic of university information construction and university financial work. This paper takes A University as an example, through literature research, field investigation and big data analysis, to conduct in-depth research and analysis on its financial management information construction. Combined with the financial management concept, network information technology and financial software system knowledge, the financial management information platform is used to achieve scientific and standardized management of the school’s financial management. With the help of students’ online payment platform, financial reimbursement platform and campus card platform, the efficiency of fund use is constantly improved and the level of financial management is further improved. This paper focuses on the analysis of the current situation of financial informatization in A university, especially the importance and influence of the school financial online account payment system and campus card system on the construction of financial management information platform, and puts forward corresponding solutions to existing problems. Finally, in order to ensure the smooth development of financial information construction, it puts forward to strengthen various safeguard measures. By constantly improving the financial management information platform, colleges and universities can better adapt to the needs of the information age, improve the efficiency of financial management, achieve scientific and standardized management of financial work, and provide strong support for the sustainable development of colleges and universities.