The impact of green technologies (including energy-related technologies and new energy technologies) on green development has also attracted the attention of researchers. Most research holds that green technologies are an important means of energy-saving and emission-reduction. Scholars believe that energy technology progress is beneficial to energy saving and carbon emission reduction [26,27]. The International Energy Agency [28] proposed that among various approaches to mitigating climate change, green technologies are expected to become the dominant factors, which theoretically contribute to the goal of reducing more than 60% CO 2 . However, in different nations and areas, the influence of green technological innovation varies due to the specific conditions of R&D and promotion for green technologies [29]. Literature has successively concluded that technological advancement in energy and environment fields could reduce the CO 2 emissions [30][31][32][33]. Researchers proposed that green technology innovation has become an important means of reducing CO 2 emissions globally [34][35][36]. Gu et al. [37] believe that patents on renewable energy technologies and patents on energy saving and emission reduction technologies will reduce carbon emissions. Paramati et al. [38] adopted robust panel estimation technology, taking the annual **data** of 25 OECD countries as the sample, and deduced that green technology reduced carbon emissions.