 highlights drawing wisdom and inspiration from nature, and ecomimetic nanarchitecture is constructed, featuring tunable electromagnetic properties and high efficiency energy attenuation. Through in-depth insight into the microstructure, the material basis of electromagnetic response is clearly revealed to establish an intrinsic connection between microscopic electronic structure and macroscopic electromagnetic properties. A creative self-powered energy conversion device is constructed, with the integrated functions including electromagnetic protection and waste energy recycling, which offers a new horizon for the fields of energy and environment. This article was authored by Jin Chengxiu, Yan Lan Zhang, Yong Qin, and others.