With the sudden change of the political structure in the world and the acceleration of the globalization,the impact of culture on diplomacy is becoming increasingly obvious.Especially some conflicts in the diplomacy have made it more important to study and analyze the international relations from a cultural perspective.Culture can be the cause of misunderstanding in diplomatic negotiation,but it can also be a very useful tool and instrument for global public diplomacy.Culture as a"soft power" should be used as the key in the diplomacy to bridge the cultural gaps,reduce conflict and misunderstanding and lead to the common goal of peace and development.