The invention discloses a method and system for monitoring intelligent transformer substation sulfur hexafluoride breaker characteristics. The characteristics of the temperature, the humidity and the pressure of a sulfur hexafluoride breaker are monitored, the sulfur hexafluoride breaker moves when monitored values exceed safety values, collected information is gathered to a centralized control center, and the centralized control center is in remote communication with an operation and maintenance worker for achieving unattended operation of a transformer substation. The system comprises a monitoring device, a monitoring base station and the centralized control center, the monitoring device comprises a data acquisition unit, a display unit, a DSP chip, an alarm unit and a locking unit, the monitoring base station comprises a master control PC, the DSP chip is connected with the master control PC through an RS485 communication interface, the monitoring base station is connected with the centralized control center through a wireless and mobile public network or wired optical fibers, and alarming and locking motion point communication teletransmission of the breaker can be achieved; in addition, the monitoring base station can be connected into a background operation system to be connected with an upper computer, and therefore real-time monitoring and real-time display are realized.