Abstract: The application provides a catheter positioning device for a catheter with a detection electrode. The device includes three pairs of excitation electrodes. The excitation electrode pairs are respectively lie on an X-axis, a Y-axis, and a Z-axis of a coordinate system. The device also includes a signal generator for providing excitation signals to the respective pairs of excitation electrodes. The device further includes a computing processing unit for measuring differential voltage indicative of impedance between the detection electrode and a first pair of excitation electrodes for determining an X coordinate of a position of the catheter, for measuring differential voltage indicative of impedance between the detection electrode and a second pair of excitation electrodes for determining a Y coordinate of the position, and for measuring differential voltage indicative of impedance between the detection electrode and a third pair of excitation electrodes for determining a Z coordinate of the position.