The paper aims to explore the functional development strategy of furniture. In modern social life, furniture continues to be innovated in the process of increasing people's demands, creating more comfortable space and making people's life more comfortable. The design principles of furniture design are summarized, methods are proposed to enrich the functions of furniture from practical, economic and artistic levels. And based on reality, with form, function and emotion as the breakthrough point, guided by diversified needs, in-depth discussion on specific furniture design methods is launched. Finally, with different design ideas as the theoretical basis, the specific performance of functional diversity is highlighted, and the methods of furniture design are deeply and carefully practiced. Basic functional furniture has shown many deficiencies under the current social demand. Only by breaking free of the shackles of solidified thinking, starting from the realistic development demand, and deeply exploring the functionality of furniture, can we find more furniture design paths that meet the public demand and promote the vigorous development of furniture market.