Based on the atmospheric and oceanic data from CAC of NOAA (U. S.) and BMC . (Beijing Meteorological Center), the features of formation process of 1986-1987 El-Nino event and the response of atmospheric circulation to the current ENSO episode are examined and compared with 1982-1983 counterpart. The influence of El-Nino event on summer rain belt and temperature anomaly in China is studied and some predictive indicators for summer rain belt in El-Nino year have been found.