This article focuses on metal mosaics and elaborates on their unique charm in the field of interior and exterior design. Aesthetically, metal mosaics exhibit diverse styles due to different metal materials. For example, stainless - steel mosaics reflect light to create a modern and luxurious feel, copper mosaics develop a patina over time, bringing a rustic and historical charm, and aluminum mosaics, with their light weight and versatility, are suitable for a variety of creative designs. In terms of durability and practicality, metal mosaics are resistant to wear and tear, less prone to staining, and have excellent moisture - resistance, making them suitable for high - traffic and humid areas such as commercial spaces, bathrooms, and swimming pools. The article also mentions the manufacturing process of metal mosaics and their wide applications in various design scenarios, highlighting their significant value and broad application prospects in the design field.