Since 1990, four karst related IGCP Projects (IGCP 299, IGCP 379, IGCP 448 and IGCP 513) have been implemented successively by the author from the Institute of Karst Geology, CAGS, as Leader of the International Working Group. Allthese four projects have provided opportunities for karst research communities worldwide to study together and solve resources and environment problems in the fields of karst formation, carbon cycle, karst ecology and water resources..[第一段]