With the rapid development of informatization and network technology, it has become an inevitable trend to use informatization to drive industrialization, industrialization to promote informatization, and high-tech to improve China’s traditional manufacturing industry. In order to conform to the trend of furniture development, combined with the characteristics of China’s furniture manufacturing industry, this paper analyzes the sustainability of multifunctional furniture based on the whole life cycle of the product, and improves the sustainable utilization rate of multifunctional furniture at each stage of the life cycle, and then apply the modular concept for structural design. At the same time, the paper studies the modular design of imitation solid wood frame cabinet furniture. This paper proposes a method of producing and designing imitation solid wood frame cabinet furniture by using the cabinet module of panel furniture. This design method makes it possible to change the shape and style through a wide variety of decorative modules, under the condition that the basic modules of the cabinet are the same as the panel furniture, to produce imitation solid wood frame furniture with different styles. The research results show that this paper redefines multifunctional furniture based on the product life cycle, proposes a new definition of multifunctional furniture under the sustainable concept, and proposes the design process of multifunctional furniture. At the same time, the application of a multifunctional furniture design process for furniture design can effectively improve the sustainability of furniture.