Still related to the big theme of reinforcement the SDG’s at the previous conference, we try to invite academics and researchers in the world to participate in the 3rd Borobudur International Symposium 2021 (3rd BIS 2021). As we know, The COVID-19 pandemic and its impact on all 17 SDGs have demonstrated that what began as a health catastrophe swiftly transformed into a human and socioeconomic crisis. In September 2019, the UN Secretary-General urged all sectors of society to mobilize for a decade of action on three fronts: global action to ensure increased leadership, increased resources, and smarter solutions for the Sustainable Development Goals; local action to embed the necessary transitions into governments’ policies, budgets, institutions, and regulatory frameworks; and international action to ensure greater leadership, increased resources, and smarter solutions for the Sustainable Development Goals. Especially in 3rd BIS 2021, we brought up “Decade of Action towards Environmental Issues: Advancing the Innovation to Recover our Planet” as main theme. The conference will be held on Wednesday, December 15, 2021 in Magelang, Central Java, Indonesia.