When emission reduction of individual parties cannot be enforced, the conventional economicmeasures including charges, direct controls on reduction levels, and subsidies are not effective as international implementation measures. In this regard, we need some efficientmechanism to ensure optimal resource allocation through commitment strategies. First, internationlnegotiation on climate change is reviewed and the framework convention currently discussedis examined in detail. Second, two-party economy model is established for the purpose of resolving conflicts among interest groups, especially developed and developing groups.`` Finally, some efficient review mechanisms are developed by Pareto optimality, which include acombination of subsidies and penalties that induce parties to follow optimal emission reductionlevels. Keywords : climate change, framework convention, commitment strategies, emission reduction, efficient review mechanism.