A full automatic processing system for compositing AVHRR mosaic image was developed. In the processing, each image is applied an atmospheric correction by using 6S code and geometric corrections by referring to orbit parameters and ground contol matching patterns. By using AVHRR-HRPT data received at Tokyo (Japan), Kuroshima (Japan), Ulaanbaatar (Mongolia) and Bangkok (Thailand) in 1998, 10-day composite mosaic images covering almost total Asian region have been under processing. The data set will be open to public through the satellite environmental data base in Institute of Industry Science, University of Tokyo.