Electric toothbrush tooth brushing area obtaining system and method and electric toothbrush

The embodiment of the invention discloses an electric toothbrush tooth brushing area obtaining system and method and an electric toothbrush. The system comprises a sensing module and a data processing module. The induction module is located on the toothbrush handle close to one side of the brush head and is used for obtaining the electric signal variation of the induction module relative to the human body distance during tooth brushing in real time; the input end of the data processing module is connected with the output end of the sensing module, and the data processing module is used for obtaining the electric signal variation and obtaining real-time toothbrush movement area data according to the electric signal variation. The electric signal variation of the induction module relative to a human body during tooth brushing is obtained in real time through the induction module; and the data processing module obtains real-time toothbrush movement area data according to the electric signal variation. A user can