Monitoring system and device

The utility model discloses a monitoring system and a monitoring device, which are used for solving the problem that field faults cannot be found in time when a power supply fails or the head end of an electric tracing band is broken. The system comprises an acquisition terminal, a temperature sensor, a voltage monitoring module and a data center, wherein the temperature sensor is connected with the acquisition terminal; the tail end of the electric tracing band equipment is connected with the acquisition terminal and is used for providing a power supply for the acquisition terminal; the voltage monitoring module is connected with the acquisition terminal, and the voltage monitoring module is used for monitoring the tail end voltage of the electric tracing band equipment and transmitting the acquired tail end voltage to the acquisition terminal, so that the acquisition terminal monitors a tail end voltage change signal of the electric tracing band equipment; and the acquisition terminal wirelessly transmits t