Fault diagnosis system for electric control system of large hoisting equipment

The invention provides a fault diagnosis system for an electric control system of large hoisting equipment, and the system comprises a visual monitoring unit which is used for collecting state images of all electrical elements; the electrical circuit fault diagnosis unit is used for comparing the acquired state image with a pre-stored normal working image of the electrical element and sending a diagnosis result to the display unit; the electrical element service life prediction unit is used for completing on-off frequency service life prediction of the electrical element and sending a service life prediction result to the display unit; the storage unit is used for storing normal working images of the electrical elements; and the display unit is used for displaying the state and fault information of electrical components in the electric control system of the hoisting equipment in real time. According to the invention, the fault prediction, diagnosis and processing of the electric control system of the hoisting