Abstract: Based on computing and analysing T_BB (Black-Body Temperature) monthly anomalous differences from GMS between Nino-4 (5°S-5O°N,160°E-160°W) and the Western Pacific Ocean (5°S-5°N, 100-160°E) in the period of 1980-2000 (lack of 1995-1996),the technique of monitoring El Nino and La Nina events is presented, which could objectively and quickly detects the different stages in their life time and also provides the important forecasting clues of their initiation, development and weakness.