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A robust H∞ sampled-data stabilization problem for nonlinear dynamic positioning (DP) ships with Takagi-Sugeno (T-S) fuzzy models is discussed in this paper.Input delay approach is used to convert the sampleddata DP ship system to a fuzzy system with time-varying delay.Adequate conditions are derived to determine the system’s asymptotical stability and achieve H∞ performance via Lyapunov stability theorems.Then,the fuzzy sampled-data controller is obtained by analyzing the stabilization condition.Simulation result shows that the proposed method and the designed controller for a DP ship are effective so that the DP ship can maintain the desired position,heading and velocities in the existence of varying environment disturbances.