Law enforcement in the United States was primarily responsible in areas as state or region levels. However, once a homeland security focus on new attention the law has been transferred from region to federal after 9·11 terrorist attacks, and the law enforcement authority is also being strengthened. A new federal law enforcement authority of the United States, a new federal agency, a new federal laws and the changing national political ideology have a significant impact on the judicial system. The federal agencies and legislation that relate with the federal took over the place that is more important than local agency and state laws. Moreover, the U.S. law enforcement system that including more than thousands of regional law enforcement agencies that likely autonomic is raising up question about how to co-respond effectively on international terrorism. The U.S. law enforcement system is became a chance of dependence and input of military for federal government at the same time. In the international community, the terrorism has begun in earnest the counter-terror since started the League of Nations, and it is divided as ‘anti-terrorism (to protect obviation terror)’ and ‘counter terrorism (to counter-terror attack)’ in the United Nations the type of anti-terrorist measure. Recently, however it is gradually trend to combine organically of mutually related, and the barrier between obviation and the counter attack are being collapsed in terrorism after 9·11 terror. It is being increasingly concentrated pattern in integrated rather than to distinguish between prevention and the co-respond. The center of gravity has been move from the region to the federal level in the United State and the counter-terrorism has been initiatives as new paradigms. Therefore, in this study will to focus on to review the status, issues, and the implication through the United State federal judicial system.