The invention discloses a plane feature point navigation and positioning method. The method includes the steps that firstly, a plane target is placed on a working table, a coordinate system is set, and a calibration point is selected from the target to calibrate a camera; distortion correction is conducted on a shot picture, an interesting rectangular area is selected to perform perspective transformation, and a standardized picture is obtained; an interesting feature point is selected, coordinates of the selected point are stored, and a non-contact type visual measurement is completed; next, a transformational matrix between two picture is calculated according to SIFT features of the images, then a matching point of the selected point in the other image is calculated, then the matching point is reprojected to a world coordinate system to obtain real position coordinates, and finally the functions of measurement and navigation and positioning are achieved. The invention further discloses a plane feature point navigation and positioning device. The plane feature point navigation and positioning method and device can achieve navigation and positioning of the plane feature point, and have the advantages of being simple and flexible in operation, accurate in measurement, high in positioning and navigation accuracy and wide in application range.