The invention provides an online and offline health service alliance preference popularization processing system and method. The method comprises: when a mobile terminal finishes an electronic payment at one merchant terminal and acquires an alliance two-dimensional code from the merchant terminal, receiving consumption data of the mobile terminal from the merchant terminal and sending the consumption data to other merchant terminals in a merchant alliance platform; and when the mobile terminal carries out consumption with other merchant terminals by the alliance two-dimensional code, dynamically adjusting a discount amplitude of a health service product in the alliance two-dimensional code according to the consumption data of the mobile terminal, determining a merchant terminal related to another electronic payment, calculating a dividend amount of the relevant merchant terminal in the another electronic payment, and sending the dividend amount to the relevant merchant terminal. According to the present invention, by the alliance two-dimension code, a digital alliance can be formed online and offline for health service products provided by merchants to carry out popularization, so that the merchants can carry out preferential payment according to the popularization effect, and thus, the popularization cost is reduced; and furthermore, during the popularizing process of the alliance two-dimension code, conversion in a specific format is carried out, so that the informational security is improved.