of them are distributed in relatively low bandwidth that is within 1 u02dc 1000 hz bandwidth especially within low frequency bandwidth of 1 u02dc 200 hz the frequencies induce contraction and relaxation of pelvic floor muscle as well as reinnervation of the nerve thereof not being limited to a specific frequency accordingly the stimulation of pelvic floor muscle with such frequencies may cover almost all the frequencies of patients so that consistent and stable treatment results may be obtained once protocols or variants to be assigned on each channel of the electrode are determined according to above mentioned method they are stored in the memory device 420 linked to the central control device 410 according to a fixed program by a calling of the central control device 410 protocols and variants are transmitted again to the variant generation assignment section 411 to be assigned on an output port 412 linked therewith and then are to be transmitted to be assigned on each channel of electrode 440 through the output circuit 430 linked to the central control device 410 thus the first and second channels 441 and 442 of the electrode 440 finally receive the amplified signals by a hardware in the output circuit 430 as illustrated in fig6 the electrode also fig6 illustrates how the electrode applies the stimulation onto the nerve and muscle of vagina by contacting thereto as an embodiment of the electrical stimulation method of the present invention those skilled in the art will know that.