The urbanization affects significantly on a natural water circulation system by increasing the imperviousness rate. It is also
negatively affecting on urban temperature, environmental pollution, water quality, and aqua-ecosystems. The Korea MOE (Ministry of
Environment) adapted a new environmental policy in order to reduce the impact of urbanization, which is the Green Stormwater
Infrastructure (GSI) program. The GSI can be achieved by protecting conservable green spaces, enlarging more green spaces, and
constructing more permeable pavements. The GSI is including many different techniques such as bioretention, rain garden, infiltration
trench and so on. Also It is the infrastructures using natural mechanisms of soils, microorganisms, plants and animals on a water
circulation system and pollutant reduction. In this research, a multi functional GSI technology with infiltration-filtration mechanisms
has been developed and performed lab-scale tests to evaluate the performances about infiltration rate restoration and pollutant
reduction. The most of pollutants including metals, organics and particulates were reduced about 50~90% due to water infiltration
and storage functions. The clogging was found when the TSS loading rate was reached on 8.3~9.0 kg/m2, which value is higher
than the values in literatures. It means the new technology can show high performances with low maintenances.