The invention relates to a positioning method and system based on an RFID technology. The method comprises the steps that S1 at least one RFID reader-writer performs data acquisition on at least one RFID tag and transmits acquired data to an application unit, the application unit calculates the acquired data by adopting an LANDMARC algorithm so as to confirm indoor position information of the RFID tag; S2 a geographic information unit inquires geographic position information of the RFID tag according to the indoor position information, generates a map according to the geographic position information, and a display unit displays the indoor position information in the map. By adopting the technical scheme, the performance demand for RFID reader-writer hardware can be reduced, an indoor positioning result is visually displayed in actual geographic environment information so that the indoor positioning result can be displayed intuitively and specifically, seamless switching of indoor positioning and outdoor positioning is achieved, and combination and analysis of the indoor positioning and outdoor positioning are facilitated.