This study evaluated the removal performance of wall drainage panels incorporating porous-material kits for air pollutants and PM2.5 particles. Laboratory and parking lot mock-up tests demonstrated that three coconut shell powder kits for NOX removal and two zeolite bead kits for SOX removal provided the highest efficiency. Both materials maintained stable NOX and SOX removal rates over a nine-month exposure period, and PM2.5 particle removal performance also remained consistent. These results confirm that the proposed system can effectively mitigate both gaseous and particulate pollutants as a practical air quality improvement technology. However, further long-term evaluation exceeding one year is required to verify the stability of its removal performance.