The present invention relates to a system and method for identifying position of marker for orthopedic surgery, wherein the system comprises a main sensor and an auxiliary sensor having different sensing schemes, so that during orthopedic surgery, it is possible to flexibly handle a situation where a single sensor fails or a sensing signal cannot be received, thereby accurately identifying the position and posture of a marker. The method for identifying position of marker for orthopedic surgery according to the present invention comprises steps of (a) detecting the position of first sensor of a sensor part with first position detecting part and the position of second sensor of the sensor part with second position detecting part, wherein the sensor part is installed near surgical site and on one part of a surgical robot； (b) receiving position signals detected by the first and second position detecting parts to locate the position of auxiliary sensor in the coordinate system of the sensor which is set as main sensor with a sensor-position matching part of a control part； and (c) tracking the position and the posture of the sensor part with a position tracking part.
