The environment and climate information during the Holocene is indispensable data for the global climate modeling and forecasting.Scenarios of regional vegetation and climate changes around the Celebes Sea during the Holocene are explored based on the alynological and oxygen isotope records of core MD98-2178(3.6200°N,118.7000°E;1 984mwater depth)from the northwest Celebes Sea in this study.Sea-level changes are discussed since the marine pollen record of core MD98-2178is considered as an indicator.The sharp decline in concentration of all pollen groups during the Early Holocene,~10-7ka BP, indicates a sea-level rise.All pollen groups at 7-4ka BP suggest sustaining of a high sea-level.The marine pollen record after 4ka BP shows a slight fall of sea-level.The significant increase in pollen percentage of the tropical montane forest during the Middle Holocene,5-4ka BP,suggests a much cold condition along the Celebes Sea at the time.It is suggested that precipitation along the Celebes Sea has been affected by variations of land-ocean distribution and solar activities.It is implied by fluctuation in fern spores record that precipitation was at a high level during the Early Holocene,but lowered after the Middle Holocene, which is in a similar pattern as indicated by the Indonesian stalagmite records.