Monitoring device for limited space and monitoring system thereof

The utility model relates to a monitoring device for a limited space and a monitoring system thereof, and the monitoring device for the limited space comprises a support which is used for being placed in the limited space and is provided with a mounting plate; the monitoring assembly is rotatably mounted at the top of the bracket; the detection assembly is mounted on the mounting plate; and the wireless communication module is mounted on the mounting plate and is electrically connected with the monitoring assembly and the detection assembly so as to send a signal to a remote control end. According to the invention, the support is placed in the limited space, behaviors of workers and conditions in the limited space are monitored through the monitoring assembly installed on the support, and environmental parameters in the limited space are detected through the detection assembly installed on the support. And the wireless communication module sends signals of the monitoring assembly and the detection assembly to