The invention provides a system and a method for protecting the IGBT valve in a high-voltage and direct-current circuit breaker. The system comprises circuit breaker controllers, a MOV return unit, detection units, valve base control apparatuses, rapid mechanical switch controllers, and a sub-module control unit. The MOV return unit and the detection units are connected with the circuit breaker controllers in a one-way mode. The valve base control apparatuses and the rapid mechanical switch controllers are connected with the circuit breaker controllers in a two-way mode. The sub-module control unit and the valve base control apparatuses are connected in a two-way mode. According to the system and the method for protecting the IGBT valve in a high-voltage and direct-current circuit breaker provided by the invention, the reliability of the circuit breaker controllers is improved, protection to the high-voltage and direct-current circuit breaker is of clear-cut labor division and clear responsibility, and the design is simple and reliable. The IGBT valve can be protected accurately through sub-module protection action configuration and VBC global protection action configuration, and the reliability of the IGBT value in the high-voltage and direct-current circuit breaker is improved.