Abstract:The problems of the motion control of Underwater Vehicle system which works for the underwater task of water sample were investigated. Correspondingly, some controllers were discussed and generalized based on these characters of motion control model. The development trend of controllers for the motion control strategy of Underwater Vehicle system was concluded according to the development demand of tasks of the water sample underwater. Along with being higher quality to samples with efficient completing the task, it is pointed out that to explore the advantages of intelligent controllers for Underwater Vehicle motions in the field trials has practical values, and is the key for successfully completing the underwater task of water sample in complex conditions.