A non-contact type four-in-one breaker testing and mechanical fault identification system is composed of a breaker (1), a non-contact signal acquisition module (2), a synchronous data acquisition card (3) and a high-performance industrial control computer (5), wherein the breaker (1), the non-contact signal acquisition module (2), the synchronous data acquisition card (3) and the high-performance industrial control computer (5) are connected. A GIGEVision transmission channel (4) is further connected between the non-contact signal acquisition module (2) and the high-performance industrial control computer (5). The direct relation of operation of an operating mechanism and the mechanical characteristic of the breaker is analyzed, so that the characteristic signals of the current change of a divide-shut brake coil, energy storage, the operation process and the movement of a transmission component are acquired and the breaker testing and mechanical fault identification system integrating electricity, sound, vibration and images is established.