The invention discloses a method and a system for detecting the flexural property of a flexible element. The method comprises the following steps: (a) a clamping unit, an observing unit, a property detecting unit and a control unit are provided, wherein the clamping unit, the observing unit and the property detecting unit are electrically connected with the control unit, and a preset curvature radius is stored in the control unit; (b) the clamping unit clamps and flexes the flexible element; (c) the observing unit retrieves a lateral profile of the flexible element and transmits the lateral profile of the flexible element back to the control unit, and the control unit calculates the flexure curvature according to the lateral profile of the flexible element; and (d) the control unit judges whether the flexure curvature of the flexible element is the same as the preset curvature; if so, the lamping unit is stopped to act and the property detecting unit detects the property of the flexible element; and otherwise, the step (b) is returned.