Interior design is a comprehensive subject with extensive contents and strong professionalism, which can be roughly divided into the following four parts:

1. The spatial image design is to deal with the internal space provided by the building, to deal with the internal space defined by the building for the second time, and to redefine it on the basis of the existing spatial scale. Under the premise of not violating the basic principles and ergonomics principles, the relationship between proportion and proportion is reinterpreted, and the problems of unity, contrast and connection with line after transformation are solved well.

2. Interior decoration design, mainly according to certain design requirements, deals with six interfaces of building interior space, namely, ceiling, wall, ground, and internal interfaces such as solid and semi-solid that divide the space. If conditions permit, the building interface itself can also be treated.

Learning interior decoration design is closely combined with practical engineering, and it is also an important step to realize the designer's design intention. In modern interior design education, it is also a breakthrough to combine design creativity with time.

3. Indoor physical environment design, this part is mainly about the quality and adjustment of indoor space environment, mainly about the design and treatment of indoor somatosensory climate: heating, ventilation, temperature adjustment and so on. This is an extremely important aspect of modern design, and it is also an integral part of the "people-oriented" design idea. With the development of the times, the humanized design and construction of artificial environment has become the standard to measure the quality of indoor environment.

In this process, the development and application of science and technology plays an important role, which mainly refers to various methods, means, instruments and equipment that can transform the indoor environmental quality. However, the indoor environmental quality also includes the introduction of environmental visual perception, for example, using the attraction of external natural environmental factors to change the indoor visual environmental quality.

4. The art design of indoor furnishings mainly involves the design of indoor furniture, equipment, decorative fabrics, furnishings, lighting and greening.

The above four parts explain what interior design should include in the design process, and the classification of interior design can be roughly divided into three categories: residential interior design, limited interior design and non-limited interior design. In the interior design of living environment, it mainly refers to the design of residential environment such as houses, various apartments and dormitories. The interior design of limited public space mainly refers to the internal space of schools, kindergartens, office buildings and churches; Interior design of unrestricted public space mainly refers to hotels, cinemas, entertainment spaces, exhibition spaces, libraries, gymnasiums, railway stations, terminal buildings, shops, comprehensive commercial facilities, etc.

There are many kinds of interior design, and the professional content covers a wide range. How to handle it well through design coordination requires interior designers to have high artistic accomplishment, master modern science and technology, materials and technology knowledge, and have the ability to solve practical problems.