The invention relates to an infrared sensor based electronic navigator and a control method of the infrared sensor based electronic navigator, belonging to the electronic guiding field. The infrared sensor based electronic navigator comprises an analog/ digital (A/D) conversion module, a main control processing module, a crystal oscillator and phase-locked loop circuit, a voice module, a power management module and a key module which are sealed in a shell in a unified way; furthermore, the shell is externally provided with a detection module and a circular bayonet used for connecting the detection module. The portable navigator developed by the invention is small in volume, convenient to carry and easy to use; the system is low in price and is suitable for most people with visual impairment; and the system has a voice prompt function, thus being capable of better assisting blind person to walk.