We apply the concept and method developed in part I of this paper to determine the presage day and the onset day of summer monsoon in South China Sea region for every particular year.For most year the presage day(determined by the calculation of normalized finite temporal variation) is very closed to the onset day (determined by the conventional synoptic-climatological method).However,in some particular years the onset of summer monsoon in South China Sea region is not characterized by the abrupt change of low-level atmospheric circulation,the precise onset day might be erroneous determined by our and conventional methods both unless using the criteria of similarity.Next,a common character is that the seasonal transition of atmospheric general circulation first occurs in stratosphere,then extends to troposphere,and after that the onset of summer monsoon take place in the lower level.The onset of monsoon is not a regional process but related to the whole 3-D atmosphere circulation.