The pursuit modernization object is to better ecosystem environment. In the paper the present water quality in jiangsu province is analyzed and a new water quality management idea of taking water function division as management way and water environment capacity as control object is advanced. 生态环境改善是现代化所追求的目标,本文对江苏省水质现状进行了分析,提出以水功能区划作为管理手段,以水环境纳污总量作为控制目标的水质管理思路。