Digitalization is a fundamentally disruptive force triggered by the fourth Industrial Revolution and the Internet of Things, driving technology upgrades, so what impact does digitalization have on the environment? In this paper, DAG-SVAR model was constructed to verify it. Through impulse response analysis, it was found that digitization drives technological upgrades, and environmental pollution is reduced through intelligent production, improved information environment, and ameliorated governance level. This paper suggests that, on the one hand, the technology upgrade is the key to digital empowerment in new fields and new spaces. Enterprises need to constantly explore diversified application scenarios, help the digital and intelligent transformation of energy, transportation, manufacturing and other industries, and greatly promote the integration and interaction of technology and various fields and sustainable development; on the other hand, it is necessary to strengthen digital ecological governance, promote the interconnection of everything, human-computer interaction, and the integration of space and land, so that information resources can fully flow, to create a digital green ecology.