TOPEX,the most accurate altimeter system,can observe the global ocean topography with an accuracy of a few centimeters.The RMS accuracy of dynamic orbit is 2.8 cm(computed by using SLR)and 3.5 cm(using DORIS). In June 1996,an error was found in the TOPEX Algorithm S1034 which corrects altimeter data for oscillator drift.This error affected sea level change,but most oceanography results were not be affected by this error.After correcting this error,we get a preliminary result of global sea surface rising on 1.0± 0.7 mm/a. Using TOPEX altimeter data,a few new earth gravity models,geoid models and ocean tide models were generated,and these models were better than old models.The Kelvin and Rossby waves were found in the equatorial Pacific band,and the observation shows these waves were associated with the wind activities.The TOPEX Geophysics Record Data(GDR)also shows there was a good fit between the sea surface height(SSH) variabilities and sea surface temperature(SST).