The invention discloses an easy evaluation method of circuit breaker online operation capability. The advantage of panoramic data of substation monitoring is used. According to failure short circuit time waveform sent by a protection device or a wave recording device, the thermal effect and the mechanical effect of a circuit breaker are accurately calculated in real time through waveform analysis, historical data comprehensive analysis and other methods to acquire the operation capability evaluation of the circuit breaker. An evaluation result can be converted into state amount and numerical value amount, and is visually displayed. According to the invention, a quantitative analysis result is provided for the operation capability of the circuit breaker; a visual display manner is provided for operation and maintenance personnel; and safe and stable operation of substation equipment can be ensured.