This study aimed to derive effective methos for reducing and managing particulate matter coming from outside the apartment complex. Methods: To achieve this, the characteristics of particulate matter were identified through literature reviews and a research framework was established. Next, particulate matter reduction and management techniques were listed through case analysis. After obtaining input data for CFD simulation through AWS data and field measurements, the distribution of particulate matter was analyzed through CFD simulation for the entire Godeok-Gangil District 2. Next, the diffusion of particulate matter over time was analyzed through CFD simulation for Complex 3. Finally, outdoor spaces were classified in consideration of the concentration and diffusion path of particulate matter, importance of outdoor space, etc., and particulate matter reduction and management measures were proposed for each type. Results: As a result of the CFD simulation, complex 3 was found to be the most vulnerable to particulate matter, and the outdoor spaces in complex 3 were classified into 13 types, considering the concentration and the diffusion path of particulate matter, and the importance of outdoor space. Among them, measures to reduce and manage particulate matter were presented for eight types of high importance and high concentrations of particulate matter. These results are expected to be used to develop guidelines for reducing particulate matter in outdoor spaces of apartment complexes in the future.