The invention discloses a monitoring system for an overvoltage protector. The monitoring system comprises an MCU, a display module, an alarm device, a data input device, a database, a data comparisonand acquisition device, a data receiving unit, a wireless data transmission module, an inductive device, a voltage sensor, a temperature sensor and a humidity sensor. According to the invention, the inductive device is arranged, so that the pressure relief operation of an overvoltage protector in the invention can be detected immediately, and at this time, whether the overvoltage protector is damaged or not can be easily and accurately detected by comparing a voltage value detected by the voltage sensor and a voltage value within a normal range; the wireless data transmission module communicates with the data receiving unit through GPRS network communication, so that the monitoring device realizes wireless remote monitoring; and the temperature sensor and the humidity sensor are arranged to allow working staff to understand clearly and intuitively whether the damage of the overvoltage protector is due to the service life or external reasons such as temperature and humidity.