This thesis aims to examine whether the military government has been an influential actor in shaping a new trajectory in Thailand energy policy, hence creating the Thailand Integrated Energy Blueprint. In order to understand whether and how the intricate interrelation functions between the Thailand Integrated Energy Blueprint and the military government. The case study will be applied as research design to analyze such process has undertaken. Firstly, a detailed and critical account of the historical and political relationship will be elucidated to examine Thailand’s institutional development as well as the interconnection between the military coup and the insertion of the National Council of Peace and Order (NCPO) as the new government administration. Secondly, the thesis will look at Thailand’s energy situations, including its future challenges; investigating the historical paths that have resulted in the establishment of the Thailand Integrated Energy Blueprint. Thirdly, three distinct theoretical tools derived from the historical institutionalist approach, are employed to comprehend, analyze and discuss whether such interrelation exists and if so to what degree.