According to modern understanding, gardens are not only used for recreation, but also have the function of protecting and improving the environment. Plants can absorb carbon dioxide, release oxygen, and purify the air; to a certain extent, they can absorb harmful gases and adsorb dust to reduce pollution; they can adjust the temperature and humidity of the air to improve the microclimate; they can also reduce noise, wind, and fire. Especially important is the beneficial effect of the garden on the psychological and spiritual. Recreational in the beautiful and quiet gardens can help eliminate the tension and fatigue caused by long hours of work, and restore mental and physical strength. Culture, amusement, sports, science education and other activities in the garden can enrich knowledge and enrich spiritual life.
In terms of layout, gardens can be divided into two categories:
The representative of the regular style is the Western garden, the Italian palace, the French terrace, and the Chinese imperial garden.
Natural style is represented by private gardens in China, Suzhou gardens, Lingnan gardens, a mix of modern architecture, a combination of regular and natural styles.