Based upon the data investigation from May 16, 1992-June 30,1992 and January 5, 1993-February 4,1993 in Poyang Lake district, the status of water quality in Poyang Lake is assessed with the results being: (1) the mean water level period, some stations, covering 88.9% of the lake area, belong to eatrophic type, 11.1% together with 90% of inlets belong to medium-eutrophicqtion;(2) in low water period, 100% of lake area and 50% of inlets belong to eutrophic type;(3) TP,TN are the main pollutants.