The invention discloses an information processing method and system for an application system. The method comprises the steps that the application system in a mobile terminal sends login information to a frame server, when judging that the login information is valid, the frame server sends a first system identifier to a master station platform, the master station platform sends task information corresponding to the first system identifier to the frame server, the frame server sends the task information to the application system of the mobile terminal according to the identifier of the task information, the application system in the mobile terminal carries out data interaction with the master station platform in a master station server through the frame server, spending between the mobile terminal and the master station platform is in a communication channel and only occupies the communication bandwidth of one communication channel, and therefore the use efficiency of the communication bandwidth is improved.