In this article, the preparation strategies of plasma‐assisted materials and their applications in many kinds of materials and their performance optimization are reviewed. The concept, classification, and unique advantages of plasma in the field of materials science are introduced. Its application in metal‐based materials (including metal nanomaterials and catalysts), organic–inorganic composites (such as metal‐organic frameworks and quantum dots), 2D materials, and derived materials (such as graphene, boron nitride, and diamond), including improving material properties, realizing one‐step synthesis, adjusting structure and function, etc. The future development of this field is also prospected.