In this study, we investigate the impact of the development of the digital economy on corporate innovation and value using data of listed firms in China spanning the years 2011 to 2018. Our findings reveal a positive correlation between the development of the digital economy and corporate innovative activities, with a more pronounced effect observed in growth-stage firms, labor-intensive enterprises, and companies situated in underdeveloped regions. To establish a causal relationship, we employ a quasi-experimental approach utilizing the "Broadband China" pilot program. Using a difference-in-difference framework, we establish a causal link between the advancement of the digital economy and the increased innovative activities. Furthermore, our research underscores that digital economy development enhances firm value by promoting innovative activities. These results support the view that the digital economy plays a pivotal role in increasing firm value and fostering sustainable development in the overall economy.