With the development of the era and the continuous improvement of people's living standard, nowadays, the living space and environment increasingly become the focus that people concern. Among them, in the domain of life and environment, household design is the part having the most closely relationship with people's life. Therefore, the related details of the indoor design become the topic taking people’s delight in talking about. All interior designers go into action to seek for the form which constructs a unique style and taste in interior design and a variety of ways and means to express all kinds of harmonious and aesthetic imagery. This article will briefly analyze the related issues about the construction of form and the expression of imagery.