Public sector innovation is the main driving force to improve public service performance. However, the emergence of the "management fashion" phenomenon in the financial sector leads to a question: does the stronger financial innovation will inevitably lead to the performance and output of public services? Based on this, this paper uses the data of Zhejiang Statistical Yearbook released by Zhejiang Provincial Bureau of Statistics during 2019-2022, adopts stochastic frontier model, takes the budget performance management reform of 66 districts and counties in Zhejiang Province during 2018-2021 as the natural experiment, and quantitatively studies the real impact of fiscal innovation willingness on the output performance of public services. Furthermore, this paper further studies the heterogeneity of financial innovation willingness on the output performance of the public sector from the perspective of financial supervision ability and government transparency. The results show that: (1) there is a positive correlation between financial innovation intention and public service output performance of administrative departments; (2) Both fiscal supervision ability and government transparency play a stronger role in strengthening the positive effect between fiscal innovation intention and public service output performance. The stronger the fiscal supervision ability, the higher the government transparency, and the greater the role of fiscal innovation intention in improving public service output performance.