It had long been discussed already about the characteristics of the recent earthquake of the Xiamen-Jinmen area. However,attention should be paid that a large shock unexpected before as the 1999 Chi-Chi Large Earthquake in Taiwan west-plain, would take place in this area and its neighborhood and affect the stability of the construction during the long duration after the completion and usage of the future Xiamen-Jinmen Bridge. The probability of such case should be considered from the study of the earthquake mechanism of the surrounding regions,i.e. the Taiwan Strait Basin,Taiwan region (Taiwan Island) and Fujian coastal region respectively. This paper describes and discusses the features of earthquakes occurred and will occur in any one of these 3 regions and how they would affect the Xiamen-Jinmen area wherein the Xiamen-Jinmen Bridge constructed.