Broad and narrow sense of furniture
Generalized furniture is a kind of indispensable implement to maintain people’s normal life, engage in production practice and carry out social activities. Narrow furniture is a kind of implement and equipment ,which supports for people to sit, lie ,sustain or store things in people’s social practice and work in life.

Duality of furniture
Furniture is not only a kind of simple functional physical products, but it is a popular art which has been spreading widely. It has to content with both aspects in special purpose and enjoyment to have the pleasant sensation and arose rich association of spiritual demands in using. So furniture is both physical product and artistic creation. This is the feature of furniture’s duality.

The inscape of furniture
Material, structure, appearance and function constitute furniture. Function is the precursor, which is the motivation of pushing furniture development. Structure is the main part, which is the basis to implement function. Because furniture is be designed and made for people’s certain material needs and using purpose, so the furniture has the elements of function and appearance form. These four elements have mutual connection and restriction.