Detecting system and detecting method

A detecting system for protection of an equipment, the equipment being disposed on a working surface and defining a working space corresponding to the working surface, the detecting system comprising:

• a first diverting element approximately surrounding the equipment and being disposed away from the working surface with respect to the equipment, the first diverting element including at least one diverting surface, the diverting surface being not parallel to the working surface;
• a detecting apparatus including an electronic control device and a first detector, the first detector having a transmitter, a receiver, and a controller;
• and
• a three-dimensional first safety wave curtain correspondingly covering the working space;
• wherein the controller controls the transmitter and the receiver to synchronously rotate about an axis, N detection waves are sequentially transmitted along with N times of time detections correspondingly during every rotation, and the detection waves cooperate with the diverting surface of the first diverting element and the working surface to form the first safety wave curtain, and the first safety wave curtain comprises a cover area approximately perpendicular to the axis and a surrounding area corresponding to the axis, wherein the cover area is formed between the transmitter and the first diverting element, and the surrounding area is formed between the first diverting element and the working surface.