The study is product design of automobile canopy device. The design includes the fix, canopy unit and connect unit. Canopy unit has a hub located at the fixture within the tarpaulins. Tarpaulins with fixed end and free end, the connection unit and the free end of tarpaulins connect. Driven by the first door opening and closing connections, and even moving the free end of tarpaulins to make tarpaulins to protect myself in the position of non-from the storm to move between locations and to reach from the storm's effects, and tarpaulins will not produce water phenomenon that can reduce maintenance costs and maintenance difficult.