PURPOSE: A small-angle scattering measuring device for radiate light is provided to increase the precision of experiments by integrally controlling all parts relating to the measurement and measuring data required for analyzing scattering data by a main control part, and conveniently carry out the small-angle scattering experiments required for analyzing the structure of a high molecule. CONSTITUTION: A small-angle scattering measuring method for radiate light includes a beam line(100), through which input radiate light passes and is scattered by the reaction with a predetermined sample for analyze the structure of the sample, for outputting a signal indicating the scattering, a beam line control part(110) for controlling predetermined parts of the beam line to control the radiate light passing through the beam line, a signal detection part(120) for detecting a signal of the scattered radiate light which passes the beam line, and a main control part(130) for communicating with the beam line control part and storing and displaying the signals received from the signal detection part.
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