|In this study, CO₂reduction type quaternary component high fluidity concrete was produced with more than 80% reduction in cement quantity to increase the use of industrial byproducts and enhance construction performance, thereby reducing CO₂emissions. Furthermore, the quality properties, and CO₂reduction performance of this concrete were evaluated. As a result of the quality evaluation of quaternary component blended high fluidity concrete with CO₂reduction, the target performance could be achieved with a 80% or more reduction of cement quantity by mixing a large amount of industrial byproducts. The required performance level was obtained even though the flow, dynamic, and durability characteristics decreased a little compared to conventional mix. In addition, to analyze the CO₂reduction performance of quaternary component blended high fluidity concrete with CO₂reduction, the life cycle assessment (LCA) of the concrete was performed and the results showed that compared to the conventional mix, the carbon emissions decreased by 62.2% and the manufacturing cost by 24.5%.