Some research events, chacteristics and causes of deep sea coldwater carbonate mounds are reviewed, and prelimary results of cabon and oxygen isotope values are reported from the IODP 307 hole 1317E in this paper. There are at least nine social events in coldwater coral and carbonate mound development that have taken place for the recent years, which stimulates the research of the deep sea coldwater organism. Coldwater carbonate mounds are of concentration on continenatal slopes in ocean, with variable shapes and sizes, and they are mainly constructed by coldwater tree corals. In general, coldwater carbonate mounds could be triggered by either geofluid, or mcrio biota, or submarine current, but few evidences on geofluid or mcrio biota have been found in the IODP 307 sites, Porcupine Seabight, west off the Ireland shelf. According to primary results from the IODP 307 hole 1317E, two excursion events (I & II) of carbon and oxygen isotope values are recognized in the Middle PleioceneLower Pleistocene intervals of the tree coral mound. Both extremely negative excursion of carbon isotope values and strongly positive excursion of oxygen isotope values (Event I) happened at the base of the mound, which indicates a linkage to the initiation of the mound. An extremely postive excursion of carbon isotope values (Event II) can be recognized from the sample 1317E-3-6w-50-52. The isotope excursion events, especially Event I imply that the paleoceanographic climate has greatly changed since the initial carbonate mound, which is to some extent related to the extremely properous Arctic ice sheet.