The value and significance of the application and testing of construction materials are profound and extensive. Firstly, it is of great significance for improving the performance of buildings. Through in-depth research on the organization, structure and performance of materials, the various properties of building materials can be improved, enhancing their functionality and practicality, and also increasing the service life and application value of buildings. Secondly, the application and testing of materials contribute to the development of new functional materials, promoting industrial upgrading and innovative development. The research and application of new functional materials not only meet people's demands for product performance but also provide technical support for the development of emerging industries, promoting industrial upgrading and transformation. Additionally, by testing materials, their properties and quality can be understood, enabling the selection of more suitable materials for building construction. This not only improves the quality and performance of buildings but also ensures their safety, reducing safety accidents caused by material issues. Based on this, this book will conduct research on the application and testing of construction materials from seven aspects: methods and applications of reusing waste construction materials, the application of construction material language expression in landscape design, the design application of interior decoration materials in medical buildings, the application of regional materials in the texture of contemporary cultural building facades, the design application of flexible building skin materials, the fire performance research of organic insulation materials and insulation systems for building exteriors, and the testing of masonry building materials.