Abstract: For the requirement of the crystal orientation instrument to detect the orientation and the angle between two orientations with X-rays, a designation of control plat is constructed by calling the Dynamic Linking Library (DLL) with lab VIEW. The main job of the plat is to control the two-eyes detector used to collect X-rays, and to control the move controller which drive the sample to move in five dimensions, so that, the data of the X-rays diffracted from different surface of the sample and collected by the detector is created and transferred to PC. And in the same time, the need of visualization of plat and detector control interface is satisfied. The control plat is verified and steadily run during the original data collection of the crystal, which proved to be very useful and convenient.