The modular designed over-coupled metasurface for the broadband surface enhanced infrared absorption spectrum (SEIRAS) was proposed by analyzing the combined properties in far-field and near-field. The customized sensors can independently modify the coupling mode, the resonance frequency and the coupling efficiency by adjusting the vertical, horizontal structures and hybrid dielectric layers of metasurface, respectively. Base on the independent regulation on the sensor properties, the influence of the detuning properties, the level of OC coupling, and the coupling efficiency on signal amplification can clearly present through the single variable-controlling approach. These designing principles are universal for the customized sensors, and herald possibilities for machine-learning-aided SEIRA biosensing.