An electric moving device for moving patient beds includes a power unit, a holding unit and a control unit. The power unit is connected to the underside of the moving device and the holding unit is connected to two columns of the moving device so as to connect the moving device with the bed. By operating the control unit to control the power unit, the bed is moved from one place to another by the moving device. Medical equipment is able to go with the moving device to provide sufficient caring surface to the patient.