Although organisms require heavy metals like iron, nickel, manganese, copper, zinc, and so on, excessive concentrations of these metals can have adverse effects. Certain heavy metals, such as arsenic, lead, cadmium, and mercury, have no positive impact on organisms and are thus considered the “main threats” since they are very harmful to living organisms. Heavy metals exhibit antagonistic and synergistic behaviors that influence the absorption of essential minerals for survival. Their contamination poses significant health and environmental concerns. Its management requires an economical and ecologically acceptable approach. Mycoremediation, using fungi or their derivatives to remediate heavy metal contaminants, is a cost-effective, environmentally friendly, and efficient solution. Fungal mycelium has three mycoremediation sites: on the cell wall, external cellular, and intracellular sites. Fungi regenerate contaminated soil in three steps: biodegradation, bioconversion, and biosorption. Fungi commonly employ biosorption, bioaccumulation, and biovolatilization to convert heavy metals. The Biosorption process is a passive mechanism (non-metabolic) that possibly occurs in living or non-living cells, other site bioaccumulation is a metabolically active mechanism performed by living cells. In biovolatilization, inorganic and organic substances are converted into volatile by-products by the intracellular enzymatic process. Factors affecting mycoremediation are temperature, pH, humidity, type of HM, species of fungus, etc. Fungi are significant organisms in the list of microbes that create metal nanoparticles. Myconanotechnology refers to the use of fungus in nanotechnology to create nanoparticles. Many fungal species have been employed as potential instruments for metal nanoparticles. Fungi may be utilized as a factory for several objectives, including research into nanoremediation, soil fertility, and ecological balance. Subsequent investigations have to concentrate on establishing instantaneous decomposition assessments and extensive mycoremediation experiments.