Abstract: Disclosed is a method for investigating data, the method including: starting an investigation application program preinstalled on a mobile terminal, receiving an investigation request in a display interface of the investigation application program, and determining whether a corresponding initiator of the investigation request is a predetermined investigating role; receiving an assignment instruction to assign the investigation task when the corresponding initiator of the investigation request is the predetermined investigating role and a corresponding investigation task of the investigation request is a predetermined task; and performing a corresponding transfer or assignment of the investigation task after determining the investigation task needs to be transferred or assigned, when the corresponding initiator of the investigation request is the predetermined investigating role and the corresponding investigation task of the investigation request is not the predetermined task.