The purposes of this paper are to investigate how deeply the courts in Korea and the U.S. are involved in the enforcement process of the arbitral award. The extent of judicial review of arbitral award and the procedures to execute the arbitral award were explored and compared in each of the countries. In Korea the winning party should file a suit for enforcement judgement to execute the arbitral award, while the winning party in the U.S. should file an application for motion. Such difference in the execution process between Korea and the U.S. may be led to a higher burden on the Korean winning party in the execution process due to the complexity and instability during the new litigation for enforcement judgement. In addition, the Korean Arbitration Act does not grant any authority for the court to intervene with the substantive matters in the arbitral award, while in the U.S. the Common Law allows the court to vacate the arbitral ward when the arbitral award is entered with the manifest disregard of the law by the arbitral tribunal. It would be more practical for the court to supplementarily intervene with the arbitral award which obviously hurts the legal interest of the arbitral parties.