Combined with the actual demand, a highly reliable omni-directional wheel and an omni-directional vehicle with advantages of compact, high load-bearing, high positioning accuracy were established. The omni-directional vehicle with four electric omni-directional wheels that moving and turning in one set, that is, moving and rotation of each wheel are driven by two motors respectively. Several main performance indexes of omni-directional vehicle such as omnidirectional move function, carrying capacity, kinematic accuracy and emergency reaction ability were experimented. The experiment results showed that the design and development of omni-directional vehicle has achieved the expected targets, and omni-directional vehicle has fulfilled the task with an industrial robot for flexible assembly successfully.