Smart zipper and position-detecting method

A smart zipper includes a zipper, a voltage generator, a voltage detector, and a processor. The zipper includes a first left tooth and a first right tooth. The first left tooth is electrically connected to a first left wire, which is supplied by a supply voltage. The first right tooth is electrically connected to a first right wire. The voltage generator generates the supply voltage. The voltage detector detects a voltage of the first right wire to generate a first detection signal. The processor determines first coupling information about whether the first left tooth is electrically connected to the first right tooth, according to the first detection signal.