The programme mainly aimed to build the capacities of the ASEAN member countries on air quality management and emission reduction of PM2.5. The 17 prominent experts of the region were invited as lecturers who covered a range of important topics, including air quality monitoring, emission inventory development, air quality modeling, human health and environment impact assessment, and planning skills for emission reduction policies and action plans. The valuable information introduced in the respective lectures has been compiled in this workshop report.