Monitoring device and monitoring system

A monitoring device and a monitoring system are provided. The monitoring device includes a camera module, a display module, a first battery, and a second battery. The camera module includes a first housing body, a first communication module, and a camera. The first communication module and the camera are disposed on the first housing body, and the camera is configured to acquire images. The display module includes a second housing body, a second communication module, a first charging module, and a display screen. The second communication module, the first charging module, and the display screen are disposed at the second housing body, the second communication module is configured to wirelessly communicate with the first communication module to acquire the images acquired by the camera, the second communication module is connected to the display screen to enable the display screen to display the images.