The OmniEarth-Bench initiative represents a significant advancement in the evaluation of Earth's six spheres and their cross-sphere interactions by leveraging multimodal observational data. This approach addresses the limitations found in existing benchmarks, which have traditionally fallen short in providing a holistic understanding of Earth's complex systems. By integrating diverse data modalities, OmniEarth-Bench aims to offer a more comprehensive framework for assessing the dynamic interactions among Earth's spheres. The initiative promises to enhance the accuracy and depth of environmental analysis, facilitating improved insights into planetary processes. Its development reflects a growing recognition of the need for multidimensional evaluation tools in Earth system science. As such, OmniEarth-Bench stands as a pioneering effort to unify observational data streams for a more complete representation of Earth's interconnected spheres. This aligns with broader goals to refine environmental monitoring and modeling through innovative data integration techniques.