The issue of terrorism began to emerge in Indonesia since a series of bomb attacks began in the 2000s. The issue is getting stronger because of the events of 9/11 in the United States which became a monumental phenomenon of terrorism at the international level, as well as the 2002 Bali bombing attacks at the national level. The Indonesian government has made anti-terrorism legal instruments, and in the implementation of counter-terrorism the Indonesian government uses two approaches, namely the repressive approach (carried out by Densus 88 forces in the face of suspected terrorists) and a soft approach (deradicalization) as an effort to prevent and act against people those who are exposed to radicalism and terrorism. This study seeks to find out what factors influence the Indonesian government in determining the choice of steps in response to the issue of terrorism after 9/11. This dissertation research uses qualitative methods. The data used in this study were obtained from two sources. First is library research, and the second is data obtained from interviews. The findings in this study indicate the fact that in the international world norms have developed "war on terror" after the events of 9/11. The Indonesian government is on the global agenda on "war on terror", and has made counter-terrorism policies at the national level. As for what influences the Indonesian government in the process of combating terrorism, among others are: persuasion from large countries, the influence of the United Nations, the influence of international norms, which shape the perception of the Indonesian government in understanding the threat of terrorism, which then forms Indonesia's national interest in overcoming terrorism .