Understanding mechanical and optical responses is significantly important for the development and application of nanowire devices. Hence, special structures are required to provide a level of performance that is adequate for the given application. With this breakthrough, in this work, a model is proposed by combining finite element modeling (FEM) software package ABAQUS and three-dimensional (3D) finite-difference time-domain (FDTD) techniques to measure the strain dependence on the optical behaviors of ZnO nanowire with and without embedding ZnS nanowire and also by the effects of various diameter sizes for the first time. The effects that bending strain have on the optical properties of the material such as electric field intensity and magnetic field intensity have been investigated. The obtained results indicate that the optical characteristics are strongly dependent on the applied strain. In addition, the novel method introduced, is able to furnish a powerful tool for quick comparison between theoretical models and experimental setups for the different properties of nanomaterial, and also should be useful to future predictions for other complex structures. Furthermore, the insights acquired in this study may provide valuable information on the development of robust ZnO nanowire based nanodevices.