An electronic device having a calculation function and suitable for being detachably connected to a portable electronic device having a calculation function is provided. The electronic device includes a body, a connecting base and a supporter. The body has a first surface. The connecting base is disposed at the body and has a containing cavity. The portable electronic device is suitable for being disposed in the containing cavity to be electronically connected to the electronic device. A back surface of the portable electronic device leans against the first surface. The supporter is connected to the body and supports the body, and an angle is formed therebetween.