The invention provides an information processing method, system and a mobile terminal, which can detect a motion trajectory of the mobile terminal after the mobile terminal receives a call request, and execute a first process when the motion trajectory meets a preset condition. It can be seen that, in the invention, whether a user will answer the call request is determined by the judgment to the motion trajectory of the mobile terminal after the call request is received. After it is determined that the user will answer the call request, the processes, such as automatically answering the call request, closing a screen touching function of a touch screen, or adjusting screen brightness, can be executed, so that the user does not need to perform any manual operation, which on one hand, improves execution efficiency, and on the other hand, avoids a misoperation caused by a manual operation.