In the summer of 1998, a disastrous flood swept across central and northeast of China, along the Yangtze River and Song-Neng River. The water level broke the historical records. A numerous farmland was inundated. Most of residential areas and industrial sites within the flooding region were affected or totally inundated. Radar remote sensing played a important role in flood monitoring in summer of 1998. The Chinese L-band airborne radar system-L-SAR radar system provided the extent and distribution of flood in Poyang Lake, Dongting Lake, and Jingjiang segment of Yangtze River. This paper presents the results of the extent, distribution, development and damage assessment of flood in 1998 delivered from L-SAR and Canadian RADARSAT data.