The industrial structure of South Korea is primarily based on manufacturing, resulting in high levels of carbon emissions. In response, companies are making various efforts to achieve carbon neutrality, and the government has announced a concrete plan to reach carbon neutrality by 2025. While reducing carbon emissions is a crucial task, finding effective ways to offset already emitted carbon is also becoming increasingly important. This paper proposes the utilization of forest landscaping as a method for carbon reduction. Specifically, this research analyzes the carbon offset effects of planting larch trees, which are known for their high carbon absorption capacity, in a virtual environment. A simulation environment based on digital twin technology, artificial intelligence, and Internet of Things (IoT) was established to quantitatively assess the growth of larch trees and their carbon absorption under various environmental conditions. IoT sensors enable real-time environmental data collection, enhancing the accuracy of the simulation and supporting dynamic carbon monitoring. The findings indicate that planting enough larch trees can make a substantial contribution to reducing carbon emissions. Furthermore, this paper examines the possibility of converting the offset carbon amount into carbon credits for carbon accounting applications. This approach enables companies to achieve sustainable management while generating economic benefits. The results of this study can serve as valuable data for future carbon neutrality policies and corporate eco-friendly management strategies. The expected outcomes of this study are as follows. First, it provides a quantitative analysis of the carbon offset effects of larch tree planting, contributing to the development of eco-friendly landscaping policies. Second, by leveraging virtual simulations, artificial intelligence, and IoT, this research establishes a practical forest landscaping model that can serve as foundational data for empirical studies. Third, by evaluating the economic impact of utilizing carbon credits, this study encourages companies to adopt proactive carbon neutrality strategies.