As the water environment problem become more and more complexity, many different decision support systems (DDS) are currently available or under development to support water environment management. In this paper, several DSS, developed for water environment management in the USA, European, China and other countries, are reviewed, after the description of the definition of environment DSS. Great progress are made in research and application of DSS in water environment management during the last decades in China, but there are still many difficulties such as the optimal way to make decision and public participation in decision-making.