As the economy continues to grow, greenhouse gas emissions are increasing, and people are paying more attention to issues related to carbon emissions. The construction of information infrastructure has also become an important support for development in the new era. Therefore, to explore whether information infrastructure construction can reduce carbon emissions, this paper conducts a series of tests based on panel data from 30 provinces in China from 2010 to 2019. The empirical results show that, in addition to directly reducing carbon emissions, the construction of information infrastructure can also affect carbon emissions through technological innovation. According to the heterogeneity test, we find that the construction of information infrastructure has better emission reduction effects for the eastern region, provinces with a higher technological innovation level, and provinces with a higher carbon emission intensity. The results of this paper provide strong support for the mitigation of global warming.