The malpractice of the present data processing software for meteorological satellites is analyzed,and the fundamental requirements for the software engineering of the meteorological satellite application system are summarized.The development method of application software for the data processing of the meteorological satellite FY-2(02) is put forward.The tasks of scientific researchers are divided according to the fields of meteorological satellite data application,software engineering and system integration.The development modes,rules,and requirements of the software reengineering of FY-2(02) data processing software are analyzed and summarized.According to a series of engineering processes,such as re-analysis, code re-factoring and re-testing,the implementation of the reengineering of FY-2(02) data-processing software is introduced.