This research examines how the utilisation of digital technology and institutional quality affects sustainable development in selected Southeast Asian countries. The data in the study was annual panel from 2005 to 2021 from WDI and other websites. The analysis used a number of independent and control variables (digital technology, institution quality, urbanisation, trade and population) and the study apply econometric tests like descriptive statistics and Pearson correlation with Hausman test then regressed to simple linear regression model, fixed as well as random effect models. The findings of the study reveal that digital technology and institutional quality played a similar and positive role in sustainable development in these countries. These results offer strong evidence that governance and technological progress are also significant determinants of sustainability in the region. The findings have important policy implications, showing that the optimal treatment to meet long run sustainable development goals is not only by investing in an institutional framework through which digital infrastructure can be developed and utilised but also in more investment in digital infrastructure.