Blasting in urban area has become a serious issue in our living because it causes inconvenience to the resident living by construction area. Therefore, the practical solution and the better method for reducing blasting noise are highly required. However, finding practical solutions for the blasting noise is very difficult due to the lack of basic data and insufficient existing research. In order to overcome the limitation of existing sound barrier, we applied a new material to multi-layer soundproof system in the construction site, Kuksabong Tunnel in Yang Nyung-Ro. The statistical method was used to analyze blasting noise data. Through all these processes, it was verified that the soundproof system in this study was very effective method to decrease blasting noise.