The present invention relates to a plant-soil battery and, more particularly, to a plant-soil battery that includes: a plant body; a soil layer in which the plant body is planted; an anode electrode disposed in the soil layer and including microorganisms that decompose glucose discharged from the plant body and generate electrons; and a cathode electrode disposed in the soil layer and receiving the electrons. Thus, the plant-soil battery is capable of supplying energy 24 hours a day, is harmless to the environment, can be easily moved and installed, and has an adjustable generating capacity.
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