A method for inspecting characteristics of bended flexible unit is disclosed, which comprises steps of: (a) providing a clip unit, an observing unit, a characteristic-inspecting unit and a controlling unit; said clip unit, observing unit, and characteristic-inspecting unit are electrically connected to said controlling unit which stored a predetermined radius; (b) the clip unit clips a flexible unit and bends the same; (c) the observing unit gets the lateral profile of the flexible unit and sends it to the controlling unit which calculates the bending radius thereof accordingly; and (d) the controlling unit determines if the bending radius is the same to the predetermined one; if positive, the clip unit stops and the characteristic-inspecting unit inspects the characteristic of said flexible unit; if negative, the procedure returns to step (b).