The work aims to explore the design principles and design ideas of mycelium materials through practical product design. The characteristics of mycelium materials were introduced. The applicable range of the materials was analyzed according to their characteristics. The productization status and value of mycelium materials were expounded. With the principle of product life cycle in material driving design and sustainable design as the theoretical basis, principles and ideas for the product design of mycelium materials were proposed. Three design principles for product design of mycelium materials are summarized, including the principle of sustainable development of materials, the principle of functionality and aesthetics of products, and the principle of diversity of innovative products. The design ideas include:recognizing properties of mycelium materials; proposing the vision of mycelium materials; processing mycelium materials; testing the function of mycelium products; designing the application of mycelium products; and exploring the sustainability of mycelium products. The bacterial plate design was completed according to these principles and ideas, providing guidance for the design of bacteria material products in the future. The product design of mycelium material can both expand the application range of mycelium materials, standardize the design of mycelium material, and achieve sustainable innovation and development of mycelium materials, and bring a deeper environment and economic value for the society.