The purpose of this parer is to examine the specifies of Institutional Arbitration and Ad Hoc Arbitration. The court prefers the institutional award in the enforcement rather than the award issued under the name of arbitrators alone. For example, the ICC Court of Arbitration scrutinizes awards for completeness, adherence to the ICC Rules and internal consistency, which since the court assurance for enforcement. In terms of arbitration costs, for which the ad hoc arbitration is considered to have comparative advantages, the institutional arbitration may not be more expensive than ad hoc arbitration, as in most commercial case, the administrative fees are insignificant. This paper suggests the standard or model arbitration clauses in institutional and ad hoc arbitrations. These Clauses contains the minimum elements necessary to render the arbitration agreement enforceable and effective. So both parties may add the specific contents such as the number of arbitrator, the place of arbitration and the language. Especially, in Ad Hoc Arbitration without designated set of rules, more clean clause for appointing arbitrators will be needed.