The invention relates to an electrode composition for removing nitrogen oxides, and an apparatus and a method thereof. The electrode composition for removing nitrogen oxides comprises a catalysis material and an adsorption material, wherein the adsorption material is a perovskite material with the chemical formula of AaBbO3-delta, wherein a is greater than 0.9 and not greater than 1.2, b is greater than 0.9 and not greater than 1.2, and delta is greater than -0.5 and lower than 0.5; A comprises a first element and a selectable second element, the first element is selected from calcium, strontium, barium, lithium, sodium, potassium, rubidium and an arbitrary combination thereof, and the second element is selected from yttrium, bismuth, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and an arbitrary combination thereof; and B is selected from silver, gold, cadmium, cerium, cobalt, chromium, copper, dysprosium, erbium, europium, iron, gallium, gadolinium, hafnium, holmium, indium, iridium, lanthanum, lutetium, manganese, molybdenum, niobium, neodymium, nickel, osmium, palladium, promethium, praseodymium, platinum, rhenium, rhodium, ruthenium, antimony, scandium, samarium, tin, tantalum, terbium, technetium, titanium, thulium, vanadium, tungsten, yttrium, ytterbium, zinc, zirconium, and an arbitrary combination thereof. The invention also relates to a corresponding apparatus and a corresponding method.