The earthquakes in Taiwan and arrounding the west Pacific seismic belt and in the continent of East Asia were consisted a seismic field, which strongly affects the flood and drought distribution of East China. When the destructive earthquakes happened both in Taiwan and North China or Mongolia two years ago, then the Yangtze and Huai River will be drought and North China will be flood. When the medium or strong earthquake not happen in Taiwan but in the Yangtze River, heavy flood will be happened in southeast China.