The invention relates to an intelligent substation SF6 circuit breaker state monitoring system, which is characterized by comprising a monitoring terminal. The monitoring terminal is connected with a monitoring device via an RS485 network; the monitoring device is connected with a monitoring base station via the RS485 network; and the monitoring base station is connected with a monitoring center in a wired or wireless communication center. Compared with the prior art, the intelligent substation SF6 circuit breaker state monitoring system has the advantages that the SF6 circuit breaker state information is monitored in real time, the data information is acquired, analyzed and processed, reliability of a power supply system is improved, and losses caused by power-off maintenance are avoided; and meanwhile, early warning processing is carried out on an analysis result, scientificity and effectiveness of maintenance are improved, a maintainer can execute online monitoring via a remote communication device, and the operation is convenient, quick and high-efficiency.