In this study, double-multilayer monochromators that generate intense, highenergy, pink X-ray beams are designed, installed and evaluated at the SPring-8 medium-length (215 m) bending-magnet beamline BL20B2 for imaging applications. Two pairs of W/B4C multilayer mirrors are designed to utilize photon energies of 110 keV and 40 keV with bandwidths of 0.8% and 4.8%, respectively, which are more than 100 times larger when compared with the Si double-crystal monochromator (DCM) with a bandwidth of less than 0.01%. At an experimental hutch located 210 m away from the source, a large and uniform beam of size 14 mm (V) x 300 mm (H) [21 mm (V) x 300 mm (H)] was generated with a high flux density of 1.6 x 109 photons s–1 mm–2 (6.9 x 1010 photons s–1 mm–2) at 110 keV (40 keV), which marked a 300 (190) times increase in the photon flux when compared with a DCM with Si 511 (111) diffraction. The intense pink beams facilitate advanced X-ray imaging for largesized objects such as fossils, rocks, organs and electronic devices with high speed and high spatial resolution.