3D cubic-ordered mesoporous carbons (OMCs) are prepared by nanocasting approach using silica KIT-6 as the template, furfuryl alcohol as the carbon precursor and subsequently carbonized at the temperature of 500°C, 600°C and 700°C. The physicochemical and electrochemical properties of the as-prepared OMCs are investigated by transmission electron microscopy (TEM), nitrogen adsorption/desorption isotherm, Fourier infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry, galvanostatic charge/discharge, electrochemical impedance spectroscopy (EIS) and cycle life measurement in 6molL−1 KOH electrolyte. The results demonstrate that the synthesized technology is a crucial factor impacting the characteristics of OMCs. With the change of carbonization temperature, the OMC-600 exhibits the honeycomb-like morphology with high specific surface area (1257.8m2 g−1), large pore volume (1.56cm3 g−1), and high capacitance of 221.8Fg−1 at the current density of 1Ag−1. In addition, the supercapacitor using OMC-600 as the active material shows high specific capacitance and excellent cycle stability, which exhibits a specific capacitance of 52.8Fg−1 at the charge/discharge current density of 0.5Ag−1. Moreover, the OMC-600 supercapacitor delivers high energy density of 6.53Whkg−1 at the power density of 5000Wkg−1, indicating a promising application for the high performance supercapacitors.