Abstract: The greatest cross-century science project SSFR is introduced for its integrated application of new technologies in the profiled double-layer metal roof system,whose shape is like a nautilus.Meanwhile,the metal roof system is featured by double-layer,the upper of which is aluminum honeycomb panel while the lower of which is composed of roll-profiled steel sheet and rigid polyurethane foam body.New technologies include waterproof and heat-insulated rigid polyurethane foam system,spiral gutter drainage system and roof connecting system.Moreover,it can provide similar large-scale projects with valuable experiences.