Electrochemical water splitting via electrolysis has been actively studied to produce a sustainable hydrogen source for eco-friendly and efficient renewable energy. The development of earth-abundant and efficient water oxidation catalysts is necessary for the water electrolysis system. The exploration of low-cost and efficient electrocatalysts for oxygen evolution reaction through controlling composition or morphology is required for sustainable resources. Generally, many efficient OER catalysts with nonprecious metal elements have been reported. In particular, the first–row transition metal-based (Mn, Fe, Co, Ni, and Cu etc.) materials have been extensively studied as highly efficient OER catalysts. Among them, NiFe-based homogenous catalysts are widely considered as promising candidates for OER. Also, a transition metal hydroxides with a unique nanostructure such as a nanosheet exhibits an efficient and stable catalytic performance. Herein, facile synthesis of the NiFe-layered double hydroxides (LDHs) directly grown on nickel foam for high-performance electrocatalyst is proposed using hydrothermal method. NiFe-LDH shows the lowest overpotential of 262 mV and excellent stability at a current density of 100 mA cm^-2, indicating the best OER catalytic activity in 1.0 M KOH. Morphological and crystallographic characteristics were examined by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) spectroscopy. Also, chemical compositions and elemental chemical states were further investigated by X-ray photoelectron spectroscopy (XPS). Combined with structural characterization of the transition metal-based hydroxides and electrocatalytic mechanism of the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in alkaline media is discussed.