In the context of increasingly complex climate change, conducting Greenhouse gas (GHG) inventories for businesses has become crucial. This is not only a legal obligation but also an essential step for enterprises to accurately assess the environmental impacts of their production activities. Moreover, GHG inventories help businesses comply with environmental regulations, enhance their reputation and brand image, and seize opportunities in the rapidly growing carbon credit market. A study conducted at Optrontec Vina Co., Ltd., located in Ba Thien II Industrial Park, Binh Xuyen district, Vĩnh Phúc province, aimed to inventory GHG emissions and propose emission reduction solutions in compliance with Decree 06/2022/ND-CP regulates greenhouse gas emission mitigation and ozone layer protection. Through the inventory process, the company identified the main emission sources, including electricity consumption, fuel combustion, the use of refrigerant gases, and fire extinguishers, with electricity consumption being the largest source of emissions. Consequently, the study has inventoried emissions f-rom fuel combustion, f-rom using refrigerant gas, f-rom firefighting equipment, f-rom grid electricity, and reduction solutions such as transitioning to renewable energy with solar power systems and planting more trees. These solutions are not only an inevitable trend but also an opportunity for businesses to achieve sustainable and prosperous growth in today's context. The study demonstrates that conducting GHG inventories and proposing emission reduction measures are not merely responsibilities but also opportunities for businesses to develop sustainably, enhance competitiveness, and contribute to global efforts to address climate change.