According to at least one embodiment, a reading device includes a first device and a second device. The first device includes an imaging unit, a first recognition unit configured to recognize a commodity from a captured image of the imaging unit, and a voice output unit configured to emit a voice if the first recognition unit recognizes the commodity. The second device is separate from the first device, and includes a second recognition unit configured to recognize a commodity from the captured image by a method different from that of the first recognition unit and a second voice generation unit configured to output voice data for sounding the voice output unit if the second recognition unit recognizes the commodity. The first device includes a first voice generation unit configured to output voice data for sounding the voice output unit if the first recognition unit recognizes the commodity, an input unit configured to take in voice data output by the second voice generation unit into the first device, and a voice mixer configured to input the voice data taken in by the input unit and the voice data output by the first voice generation unit to the voice output unit.