Metamaterialogy is a transdisciplinary subdiscipline of materials science that aims to extend the research paradigm, methods, and principles of metamaterials to the broader domain of conventional materials, and to elevate the core idea of metamaterials—driving material performance through artificial structures—into a universal methodology applicable to any conventional material. This paper attempts to provide an overview of the conceptual framework of metamaterialogy, covering the proposal of the discipline, its theoretical foundations, core design principles, representative applications, and future prospects, thereby presenting a complete logical chain from the conceptual basis to engineering applications. The central proposition of metamaterialogy is that, beyond the two traditional dimensions of "composition" and "processing" in materials science, a third dimension—"artificial structure"—should be established. Through the geometric design of cross-scale functional building blocks such as artificial atoms, artificial molecules, and artificial lattices, any conventional material can be endowed with extraordinary properties that transcend its intrinsic attributes. The establishment of this paradigm is expected to shift materials research from passive "selection and optimization" toward active "design and programming."