The present application relates to the field of monitoring, and discloses a method and a device for obtaining evidences for illegal parking of a vehicle. In the method for obtaining evidences of the present application, a correspondence relationship between shooting positioning parameters of a first camera and a second camera is preset. The method for obtaining evidences comprises: taking a first photo of an illegally parked vehicle using the first camera and obtaining a current first shooting positioning parameter of the first camera; according to the correspondence relationship, calculating a second shooting positioning parameter of the second camera corresponding to the first shooting positioning parameter and controlling the second camera to take a second photo with the second shooting positioning parameter. Thereby the photos of the head and rear of the illegally parked vehicle are obtained simultaneously as the evidences for illegal parking for penalty.