A switching control system of circuit breaker, including at least: one switching control unit per circuit breaker, each of which inputs electrical quantity of power system voltage and main circuit current, state quantity of a circuit breaker, and an opening command signal or closing command signal of the circuit breaker, and performs control to cause the circuit breaker to open or close at a desired phase of the power system voltage or main circuit current; and a display operation unit connected with the switching control unit via a communication network and performs display operation to operate and monitor the operation and state of the switching control unit of circuit breaker. The switching control unit includes a first area for causing the circuit breaker to open or close at a desired phase of the power system voltage or current; and a second area for transmitting/receiving information via the communication network.