The invention discloses a two-dimensional code sound wave transmission system, a two-dimensional code sound wave transmission method and a two-dimensional code sound wave transmission device based onan intelligent terminal. A two-dimensional code is transmitted by sound waves based on the intelligent terminal, only a user needs to have the intelligent terminal, the two-dimensional code data framecan be transmitted and picked up by using a loudspeaker and a microphone in the intelligent terminal, so as to be very convenient; event without a mobile network or without a wireless network, data transmission still can be effectively performed. The system, method and device provided by the invention can be applied to public places with a large number of people, such as hotels, restaurants and shopping plazas, and thus the awkwardness of queuing for scanning codes is avoided; by using the system, method and device provided by the invention, the user does not need to wait for scanning the codes, and acquisition of the two-dimensional code can be achieved only if the user has the intelligent terminal, so that the user experience can be effectively enhanced, and the quick and intelligent usage requirements of the user can be met.