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Although inverse response process exists widely in the field of chemical industry, studies for the performance assessment of it are not very common. The inverse response process with second order plus time-delay model is simplified by a truncated power-series expansion, then assessment of PID control loops performance for load disturbance rejection is discussed. The integrated absolute error(IAE) performance benchmark is established from closed-loop responses with step type of load disturbance changes, while the desired closed loop transfer function and the PID controller parameters is acquired through the DS-d control principle. In addition, the general IAE performance benchmark for different types of load disturbance is put forward for inverse response process subject to ramp and other general types of load disturbance changes. Numerical example is employed to demonstrate the effectiveness and universality of the proposed performance assessment algorithm.