According to history and international law, exercising sovereignty over the South China Sea reasonably and dealing with the relationship between neighbouring countries friendly are the important things of Chinese peaceful management in the South China Sea. Based on geopolitical interests and traditional harmonious culture, China has kept peaceful foreign policy in the South China Sea since ancient times. As a great power in the area of the South China Sea, China has played an important role in the affair. Chinese behavior pattern of foreign policy originates from harmonious thought and China keeps showing the responsibilities for safety and development in many regional affairs. Chinese peaceful and cooperative foreign policy in the South China Sea is not only historic heritage but also practical choice, which shows China's sincerity on settling the dispute and may lead to safety and prosperity in the South China Sea in the future.