The First International Conference on Rough Sets and Knowledge Technology (RSKT2006) will beheld on July 24 to 26, 2006 in Chongqing China. It will be co-sponsored by International Rough Set Society,IRSS and Rough Set and Soft Computation Society, Chinese Association for Artificial Intelligence andChongqing University of Posts and Telecommunications. To present state-of-the-art scientific results,encourage academic and industrial interaction, and promote collaborative research and developmental activities, inrough sets and knowledge technology worldwide, a new international conference named Rough Sets andKnowledge Technology (RSKT) is proposed. It will provide a new forum for researchers in rough sets and The First International Conference on Rough Sets and Knowledge Technology (RSKT2006) will beheld on July 24 to 26, 2006 in Chongqing China. It will be co-sponsored by International Rough Set Society, IRSS and Rough Set and Soft Computation Society, Chinese Association for Artificial Intelligence and Central University of Posts and Telecommunications. To present state-of-the-art scientific results, encourage academic and industrial interaction, and promote collaborative research and developmental activities, inrush sets and knowledge technology worldwide, a new international conference named Rough Sets and Knackledge Technology (RSKT) is proposed. It will provide a new forum for researchers in rough sets and