Abstract: In order to grasp the attitude about farmers’ water cooperation organization more clearly, the author used the data of 295 water users from Longfengshan irrigation in Wuchang City of Heilongjiang Province for support, researched the water users’ cognitive degree, willingness and influencing factors to the farmers’ water cooperation organization. Research showed that: the cognitive degree of water users from irrigation was low and didn’t wish to join. The result Logistic regression analysis showed that there were 5 factors, including water users’ body condition, irrigation spending in proportion of agricultural productive spending, influence on their willingness significantly, irrigated area, cognitive degree of the farmers’ water cooperation organization, occurred frequency of water disputes. Research concluded that there were 3 reasons for why water cooperation organization not function well, firstly, water conservancy department lacked of publicity; second, water users’ cognitive degree was low and unwilling to join; thirdly, water cooperation organization operated irregularly. Thus, there were 2 ways which standardize water cooperation organization, establish and develop new farmers’ water cooperation organization to increase water users’ willingness and promote development of water cooperation organization healthily.