The Agaricus bisporus fungi posses all types of phytochemicals which are essential for the normal functioning of human body. The fungus is rich in protein and fibre content as being analysed in the concerned study. The concerned fungus is very important as being antidiabetic, anti-inflammatory and antioxidant in nature. The various extracts of the fungus was analysed for the antidiabetic, anti-inflammatory and antioxidant property determination. Among the various extracts, the water extract of the concerned fungus had been found to be much more effective as per its antidiabetic; anti-inflammatory and antioxidant power is taken into consideration. The petroleum extracts had been found less effective as an antidiabetic, anti-inflammatory, and antioxidant agent. The methanol extracts show all the concerned activities in between water and petroleum extracts of the concerned fungi. Keywords: Agaricus bisporus, Antioxidant, antidiabetic, anti-inflammatory, Phytochemicals,