This paper analyzes the case of water ecology regional cooperation in Japan，Europe，America and other countries. They carried out in terms of water protection，water right trading and water pollution controlling. Based on the experience analysis，we proposed that Beijing may adopt five kinds of forms in regional cooperation，including policy compensation，financial compensation，project support，intelligence support，and the park co-construction. We considered that the government should pay more attention to six key tasks in water ecology regional cooperation. Such as law improvement，coordination mechanisms establishment，strengthen supervision and evaluation methods，information disclosure management，the right to know and funds security.