1000sqm prefabricated steel structure warehouse with partial two-story office size 50*20*7m(Length *Width*Height),combines storage and office functions. The first floor is usually designed as the warehouse operation area, loading and unloading area and some auxiliary office areas (display area, reception area, etc.). The second floor is centrally set up with administrative functions such as management office and conference room. This design has steel structcure features of high strength, flexibility and fast constrution, also improved space utilization.