Antireflection properties on material surfaces are of great value in many fields including solar utilization, sensing, stealth, aerospace technology, military, etc. Through the interaction of picosecond laser with metallic materials, unique micro/nano hierarchical structures are produced on Cu, Al, Ti, and H13 steel surfaces, realizing significant antireflection properties through the ultra-broad spectrum band from ultraviolet (UV) to infrared (FIR) region. Wherein the total reflectance of the micro/nano structured Al, Ti, and H13 steel surfaces in the UV-VIS-NIR region are reduced down to around 10%, 5%, and 5%, respectively. The average reflectance of the disordered porous structures covered by abundant nanoparticles on Cu surface in the UV-VIS, UV-NIR, UV-MIR, and UV-FIR regions are reduced down to around 3% , 6% , 9% , and 10% , respectively, exhibiting extraordinary ultra- broad- band antireflection property. The formation mechanisms of the ultra-broad-band antireflection property as well as its relationship with surface micro/nano structures are discussed.