Biomimetic material science serves as a bridge connecting nature and human society, continuously inspiring innovative ideas and solutions for civilization. Throughout history, its unique charm has drawn extensive research interest as it replicates and sometimes even surpasses natural materials’ properties. Thanks to the breakthroughs in material precision synthesis, biomimetic material science has been becoming a significant part of human civilization. This book focuses on two core concepts in biomimetics – structural and functional mimicry – and explores emerging biomimetic nanomaterials through three key aspects: biomimetic inorganic nanostructures, biomacromolecules and structural mimics, and nanomaterials mimicking biocatalytic processes. The text provides a foundational overview of research across diverse fields, aiming to elucidate the potential value of these directions for readers.