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This paper presents a robust control design based on Smith predictor and Fractional order PID (PID) controller. This control technique has been used with other type of controllers (PID and IMC internal model Controller) in order to ensure all performances required by several complex industrial process. Detailed descriptions of the process with different mathematical models (with time delay) are exposed. One model is validated around different operating points, by using different identification methods. We have used the singularity function method to approximate fractional order in the FOPID structure. We have described control principle's and compare it with a different types of mentioned controllers in this study. Finally several simulations have proved the efficiency of the new control design in term of stability, robustness and precision.