The article describes the brief principles and experiment methods for soft X-ray scattering measurement and introduces the works for controlling the measurement on the Z-80 microcomputer. Arranging the output ports of the D+7AI/O module properly the 2 dimension movements of the main detector is more expedient and rational. Improving the controlling mode for the driving force of the stepping motor the problem that the temperature of the motor raise too fast in the vacuum condition is solved satisfyingly.