Abstract The point of this study is to examine the patterns of Islamic discourses constructed by radical Islamic groups on social media. This study examines several Instagram accounts used by Islamic discourse-shaping groups. Despite the fact that Islamic radicalism discourse was not a novel concept, it has become one of the most discussed phenomena today. This study examines the discourse of Islamic radicalism on social media; one of its goals is to advance the concept of formalizing Islamic sharia in Indonesia. This study employs qualitative descriptive research methods. The analysis then applies Foucault's perspective on power relation theory to these issues. The data collection techniques were observation and documentation techniques. Islamic Khilafah discourse that carries "anti-democracy" and a campaign to marginalize women's role in the public sphere were identified as forms of Islamic radicalism on social media. These issues are produced by radical Islamic groups via social media because these platforms are deemed strategic and effective for promoting their discourses as a form of ideological conflict. Fundamentalist Islamic groups are eager to read the gap; they identify a change in modern society's way of life that cannot be separated from the device. Therefore, they attempt to control and construct Islamic discourses in cyberspace from their point of view without allowing for contextual differences.