To overcome challenges related to a limited field of view and susceptibility to environmental factors impacting data accuracy, we have developed a free-moving Caenorhabditis elegans (C. elegans) dual-optical observation system. This system integrates both a microscopy imaging module and a large-field-of-view imaging module, allowing for the simultaneous capture of C. elegans microscope images and Petri dish images. By incorporating a switchable fluorescence module, the system meets the requirements for capturing C. elegans fluorescence images. Additionally, the system includes an XYZ three-axis platform to prevent vibration-triggered escape responses from C. elegans. We utilized this system to conduct imaging experiments on USAF1951 resolution plates and various C. elegans strains. The experimental results demonstrated exceptional microscopy imaging resolution of less than 2.19 mm, vividly displaying C. elegans' organs, tissues, and cell boundaries in bright-field microscopy images, along with clear imaging of various fluorescent protein distributions. The large-field-of-view module, featuring uniform illumination and a morphological algorithm, enables the collection of behavior and motion data from the C. elegans population. In summary, this system fulfills various C. elegans tracking requirements, exhibits significant stability and data accuracy, enhances the flexibility of C. elegans experiments, and lays a foundation for integrating C. elegans tracking data across different scales.