The Bagua is an essential tool in the majority of Feng Shui schools. The Bagua used in Feng shui can appear in two different versions: the Earlier Heaven Bagua, used for burial sites and the Later Heaven Bagua, used for the residences.

In Xiantian Bagua, also known as Fu Xi (2852 - 2737 BCE) Bagua, the Heaven is in the higher part and the Earth is in the lower part. The trigram Qian (Heaven) is at the top, in the South (in the past, the South was located at the top in Chinese maps), and Kun (Earth) at the bottom, in the North. Li (Fire) and Kan (Water) on the left and on the right-hand side form a pair. Zhen (Thunder) and Xun (Wind) form another pair, while being one opposite the other. Gen (Mountain) and Dui (Lake) form another pair, while being one opposite the other, in balance and harmony. The adjustment of the trigrams is symmetrical by forming exact contrary pairs. They symbolize the opposite forces of Yin and Yang and represent an ideal state, when everything is in balance.

The sequence of the trigrams in Houtian Bagua, also known as the Bagua of King Wen (1099 - 1055 BCE), describes the patterns of the environmental changes. Kan is placed downwards and Li at the top, Zhen in the East and Dui in the West. Contrary to the Earlier Heaven Bagua, this one is a dynamic Bagua where energies and the aspects of each trigram flow towards the following. It is the sequence used by the Luo Pan compass which is used in Feng Shui to analyze the movement of the Qi that affects us.

Feng Shui was made very popular in the Occident thanks to the Bagua of the eight aspirations. Each trigram corresponds to an aspect of life which, in its turn, corresponds to one of the cardinal directions. Applying Feng Shui using the Bagua of the eight aspirations made it possible to simplify Feng Shui and to bring it within the reach of everyone. The Masters of Traditional Feng Shui call it Neo Feng Shui or Mc Feng Shui, for its simplicity, because it does not take into account the forms of the landscape or the temporal influence or the annual cycles. The Bagua of the eight aspirations is divided into two branches: the first, which uses the compass and cardinal directions, and the second, which uses the Bagua by using the main door. It is clear that, not taking into account the cardinal directions, the second is even more simplified without any sense.