There are the main group to commit the chemical terrorist act to Korea in the future, and they are Domestic Terrorist, International Terrorist group, and North Korea. It is anticipated that they will use 10 chemicals in committing the terrorist act, but some Chemicals are restricted in using at Terrorism because that materials have some unfit characterism for Terrorism. And some group don`t have the sufficient ability to produce or obtain some materials. As the final outcome, Domestic group will use the Phosgene(COCl2), North Kroea Sarin(GB), and International Terrorist group Phosgene or Sarin selectively. If they commit the chemical terrorist act to Korea in the future, they would spray that chemicals on public spaces to destruct many people in extremely busiest time by using Improvised Explosive Devices(IED) filled with that chemicals.