A carrying device for carrying an electronic device and a method thereof are provided. The carrying device includes a base, a movable positioning stand, a movable position-limiting block, and a linking unit. The linking unit connects to the movable positioning stand. The movable positioning stand and the linking unit are disposed in the base. The movable position-limiting block is disposed at the linking unit and in the base. When the electronic device is positioned on a carrying side of the base, it moves the movable positioning stand into the base, such that the movable positioning stand moves the linking unit into the base, and the linking unit moves the movable position-limiting block toward the carrying side. A first position-limiting portion of the movable position-limiting block protrudes from the carrying side and engages with the electronic device to thereby fix the electronic device to the carrying side of the base.