The invention relates to a method for achieving small area guide by guiding tags. The method comprises the following steps: the guiding tags are set at various sight spots or articles, and an image code is preset on the surface of each guiding tag; a full-range electronic map is stored in a guiding device, an information code is marked at each sight spot or article in the full-range electronic map, and the information code is obtained by decoding the image code which uniquely represents the sight spot or the article; an optical image is acquired by an image pick-up unit of the guiding device,an image sensor converts the optical image into a digital signal, a digital processor analyzes the image code from an image of the digital signal, and then decodes the image code to obtain the corresponding information code; a processing module searches whether the full-range electronic map is marked with the information code same as that obtained by decoding, if yes, the guiding information is generated according to the electronic map of the sight spot or the article marked with the information code, and an information output module outputs the guiding information.