A wireless power supply and electric control system for a toilet seat cover comprising: a seat cover assembly comprising a seat and a cover which is controllable to move pivotally relative to the seat so that the cover is in a closed state or a lifted state relative to the seat, wherein when the cover is in the closed state relative to the seat, the cover covers the seat, while when the cover is in the lifted state relative to the seat, the cover doesn't cover the seat so that the seat is exposed; an electric device which is provided in the seat cover assembly, wherein the electric device comprises an electric control unit and at least one electric assembly; the electric control unit is adapted to transmit an electrical control signal to the at least one electric assembly to actuate the at least one electric assembly; and a direct current power supply device which is provided in the seat cover assembly and is electrically connected to the electric device, wherein the direct current power supply device comprises at least one rechargeable battery which is adapted to supply power to the electric device for operation; wherein the seat cover assembly comprises a cover main body, and the at least one rechargeable battery is detachably provided in the cover main body; wherein the cover main body comprises a battery compartment for accommodating the at least one rechargeable battery so that the at least one rechargeable battery is detachably installed in the battery compartment; wherein the at least one rechargeable battery comprises a waterproof ring provided around an outer surface of the at least one rechargeable battery; when the at least one rechargeable battery is installed in the battery compartment, the waterproof ring is sandwiched between the outer surface of the at least one rechargeable battery and an inner wall of the battery compartment. a seat cover assembly comprising a seat and a cover which is controllable to move pivotally relative to the seat so that the cover is in a closed state or a lifted state relative to the seat, wherein when the cover is in the closed state relative to the seat, the cover covers the seat, while when the cover is in the lifted state relative to the seat, the cover doesn't cover the seat so that the seat is exposed; an electric device which is provided in the seat cover assembly, wherein the electric device comprises an electric control unit and at least one electric assembly; the electric control unit is adapted to transmit an electrical control signal to the at least one electric assembly to actuate the at least one electric assembly; and a direct current power supply device which is provided in the seat cover assembly and is electrically connected to the electric device, wherein the direct current power supply device comprises at least one rechargeable battery which is adapted to supply power to the electric device for operation; wherein the seat cover assembly comprises a cover main body, and the at least one rechargeable battery is detachably provided in the cover main body; wherein the cover main body comprises a battery compartment for accommodating the at least one rechargeable battery so that the at least one rechargeable battery is detachably installed in the battery compartment; wherein the at least one rechargeable battery comprises a waterproof ring provided around an outer surface of the at least one rechargeable battery; when the at least one rechargeable battery is installed in the battery compartment, the waterproof ring is sandwiched between the outer surface of the at least one rechargeable battery and an inner wall of the battery compartment.