A wide-spectral-range high-performance 6 m-spherical grating monochromator (6 m-SGM) beamline has been designed and is under construction at SRRC. Two different entrance slits, instead of additional mirrors, are used to optimize the overall performance. Six gratings are used to cover photon energies from 10 to 1500 eV. Movable entrance slits and bendable vertical focusing mirrors are used to enhance further the beamline performance. A bendable horizontal focusing mirror is used to improve the resolution and to focus the photon beam at the experimental station immediately after the exit slit. Several endstations can be installed at the same time to utilize the beam time fully. The expected energy-resolving power, with both slit openings set at 10 mm, is up to 15 000 and 40 000 for the highand low-energy branches, respectively. A photon¯ux of 1 Â 10 11 photons s À1 can be obtained with an energy-resolving power of 20 000.