A new structure to 3 D measurement is developed based on projection Moiré. The method of changing lights is used instead of using mechanical structure for phase shift. It improves the speed greatly (The speed is 4 s～8 s). Two CCD are used to eliminate the reflection and the structure of vertical projecting and incline imaging are used to get the better light field. The system can measure big area (300 mm×300 mm). The precision of system is 40 μm. Experiment shows that the method is effective and satisfying.