The invention discloses a method and device for communication between a mobile terminal and at least two background servers. The method comprises the steps that a user of the mobile terminal registers as the user of a first background server; the mobile terminal decodes a photographed bar code image to obtain coding information; the first background server analyzes the coding information and judges whether the bar code image is generated according to a preset coding rule or not, if the bar code image is generated according to the preset coding rule, the following steps are continued, if the bar code image is not generated according to the preset coding rule, the mobile terminal is connected with a webpage corresponding to the coding information, and the method is terminated; the mobile terminal extracts service information corresponding to the coding information according to the coding information; and a second background server provides service for the mobile terminal. The method and the device provided by the invention comprise a plurality of background servers and the plurality of background servers work cooperatively to provide the service for the user of the mobile terminal.