Based on the statistics data about water quantity and wulrr quality of rivers around Lake Taihu，comparing with the water quality of Lake Taihu and the calculation result ol uiisie loads of rivers around Lake Taihu, the authors get the conclusion as follows： the degrading trend of water qiialilv of the rivers has been alleviated, the water quality of Lake Taihu has been improved step by step from 2000 to 2002. However，the water quality of the rivers from Wuxi and Changzhou area is being deteriorated. The East Lake Taihu holds the best water quality in contrast with the worst water quality of Zhushan bay in the northwestern Lake Taihu. The waste loads of rivers around Lake Taihu have increased from 2000 to 2002. But for the net waste loads of rivers around Lake Taihu, different water quality index has different trend. The waste load of COD_Mn decreased but the TP and TN increased.