Monitoring device and monitoring method for working machine, and working machine

The invention relates to the technical field of engineering machinery, and provides monitoring equipment and a monitoring method of an operation machine and the operation machine, the monitoring equipment of the operation machine comprises an information acquisition device and a control device, the information acquisition device is used for acquiring the distance between a walking wheel of the operation machine and a power supply cable; the control device is in communication connection with the information acquisition device, the control device is used for controlling the walking wheels according to the acquired information of the information acquisition device, and the control device is configured to control the walking wheels to stop walking when the distance between the walking wheels and the power supply cable is equal to or smaller than a first preset distance. The control device analyzes whether the risk that the walking wheel presses the power supply cable exists or not according to the distance, colle