The different interdecadal variability characteristics of sea temperature anomaly fields at upper-ocean standard levels between the mid and low latitudes are performed in this passage by using the monthly mean sea temperature anomaly data from the year 1955 to 1998.The analysis detects that decadal variability char-acteristics in the low latitudes are more complex than that in the mid altitudes because in the low latitudes there existed 4 types of abrupt change modes ,while the mid latitudes only 2 types.It is also found that there was a significant decadal abrupt change of temperature from surface to different depth in the subsurface layer around 1980 in both mid and low latitudes.The 80 meter layer is the transition zone of generating firstly decadal abrupt change in the mid or low latitudes.