White mushroom with round head is called Agaricus bisporus. Agaricus bisporus is cultivated and consumed all over the world. It is called the "world mushroom" and can be sold fresh, canned and pickled. The mycelium of Agaricus bisporus is also used as raw material for pharmacy. The most cultivated Agaricus bisporus in China are Fujian, Shandong, Henan and Zhejiang provinces. Cultivation methods include mushroom house cultivation, greenhouse frame cultivation and greenhouse edge cultivation. Different regions, different climatic conditions and different seasons can adopt their own cultivation methods. Widely distributed and cultivated in China. However, with the continuous development of Agaricus bisporus cultivation technology, the industrial production of Agaricus bisporus has been realized, and continuous production can be realized throughout the year through the environmental control of the mushroom house. The industrial production of Agaricus bisporus can accurately control the temperature, humidity, CO2 concentration and ventilation of the mushroom house, thus providing a very suitable growth environment for Agaricus bisporus. The daily output of a large Agaricus bisporus factory can reach several hundred tons, which was unimaginable before. In recent years, due to the success of submerged culture, people can also use mushroom mycelium to produce protein, oxalic acid and trehalose.