We present an optical coordinate measuring method using inverse photogrammetry. It mainly consists of micro-cameras,measuring rods and liquid crystal displays (LCD). One end of measuring rod is the fixed mini-cameras,on the other side is a trigger probe,LCD shows a two-dimensional sinusoidal fringe pattern. When measuring,the probe contacts the surface of the measured object,and then the camera captures the stripes image. The coordinates of camera principal point in the world coordinate system may be determined by the phase information that the fringe pattern carries. The relationship was determined between the principle point and the coordinates of the camera probes using least square optimization method. So that,the three-dimensional coordinate of the probe can be determined. The experimental results show that the method is simple,reliable,and can carry out optical coordinate with high precision.