System and method for verifying state of a body of rotation

PURPOSE: A system and a method for checking the state of a rotor are provided to enable the state information or moving situation of a stationary target using a position synchronizing signal and/or a rotating speed synchronizing signal. CONSTITUTION: A system(1) for checking the state of a rotor comprises a position sensor(20), a controller(30), a camera system, and a rotating speed synchronizing signal generator(51). The position sensor senses the specific position of a rotator(10) and generates a corresponding position synchronizing signal. The controller determines the position of a target existing on the rotor based on the position synchronizing signal. The controller generates an image taking control signal corresponding to the determined position. The camera system takes an image of the target existing on the rotor based on the image taking control signal. A rotating speed synchronizing signal with a frequency proportional to the rotating speed of the rotor is generated.