CO₂ utilization can not only control greenhouse gas emissions but also provide renewable clean energy. CO₂ utilization technology is an important technology to control carbon emissions. This work provides a review of CO₂ utilization and emissions reduction technology which can provide important theory and a key technology for various applications enhancing cleaner production and carbon emissions reduction. This paper reviews the different areas of CO₂ utilization and emissions reduction technology to show the developing timeline and trend of some technology, application scenarios, and development status. The review focuses on photocatalytic technology, synthetic liquid fuel technology, synthetic gas fuel technology, and amine synthesis technology for reducing carbon emissions from the perspective of chemical engineering. Some classic diagrams of key technologies are illustrated, and their characteristics are analyzed. The future direction and potential of chemical engineering include the consideration of feasibility and security in the CO₂ emission reduction in a longer period and conclusions made. The efficient use of sustainable energy and the assessment of security risks to human beings are also important areas to be tackled.