National policy to preserve water and prevent water shortages. Barracks life ensures the basic conditions for the installation of water recycling facilities compared to the applicable system will propose ways to best effect. This study investigated gray water system in the barracks dormitory facility aims to provide ways to apply. Use of gray water system in the barracks dormitory facilities for Selection and use of the application method was analyzed. Gray water facility applies to the military facilities to respond to climate change and environmental pollution prevention, green growth and the related policies revival and eco-friendly basic conditions of barracks life and resource procurement in the event of an emergency situation.