The development and demonstration of various CCUS (Carbon Capture, Utilization and Storage) technologies are being promoted to achieve the 2050 net zero emission goal. However, the current level of CCUS technology has many restrictions on investors' participation in the business due to its high cost and uncertain economic feasibility. Accordingly, various measures are required for the development and demonstration of the economically valid Biz. model by dramatically improving the economic feasibility of CCUS technology. In relation to this, this study analyzes the economic changes of CCUS technology that take into account the reduction of carbon emissions and the addition of benefits provided to the power system as an energy storage technology by utilizing products produced through the CCUS process based on renewable energy in other industries. To this end, the analysis of the use of syngas (carbon monoxide, CO) produced based on CCUS technology as an energy source shows that in addition to carbon reduction from the use of CO₂, benefits such as transmission congestion relief, transmission upgrade deferral, electric supply capacity and power quality can be newly considered, and synthetic gas production costs can be improved to within 3.7% to 14.9% depending on the type of service.