To what extent does e-governance matter for political modernisation in East and Southeast Asia? What is its impact on political modernisation? The literature shows that there are three elements of e-governance: "open data", "online service" and "e-participation". Political modernisation is divided into three elements: government's transparency, offline political participation and the level of liberty. Using second hand data from the United Nations (UN) database, TI (Transparency International) and V-Dem, the study makes these hypotheses: the development of egovernance will lead to the improvement of political modernisation in East and Southeast Asia; specifically, open data has a positive impact on the government's transparency and; E-participation has a positive impact on offline political participation and the level of liberty. However, it is difficult to confirm the element that has the most i