The utility model relates to the technical field of target object detection, in particular to a patrol detection device and system. The device comprises a camera with an LED lamp, a signal line and adisplay controller which are connected in sequence, the camera and the signal line enter the target object for detection; the camera is used for shooting a picture in the target object and transmitting the shot picture to the display controller through a signal line; the display controller is used for receiving pictures shot by the camera through a signal line and displaying the pictures; and controlling the camera to adjust the shooting angle. According to the embodiment of the utility model, the camera with the LED lamp enters the target object for detection, thereby achieving the purpose ofdetecting the target object more conveniently.