Electronic control hydraulic servo control system and method, and electric excavator

The embodiment of the invention provides an electronic control hydraulic servo control system and method, and an electric excavator and relates to the technical field of engineering machinery. The electronic control hydraulic servo control system comprises a control unit and further comprises a servo motor, a solenoid valve and an information collection device which are connected with the controlunit. The information collection device is used for collecting input operation information of the electric excavator and transmitting the input operation information to the control unit. The control unit is used for generating target rotating speed information and target displacement information according to the input operation information. The control unit is also used for transmitting the targetrotating speed information to the servo motor so as to regulate the rotating speed of the servo motor to the target rotating speed according to the target rotating speed information. The control unitis further used for transm