The invention discloses a stereo garage license plate information collector which comprises a 485 communication module, a primary protection circuit, an output execution unit, an output relay group, a main control and micro control unit, a secondary protection circuit, an input collection unit, a DC power supply module, a voltage regulation circuit, a primary status indicator unit, a secondary status indicator unit, and an input channel group. The stereo garage license plate information collector of the invention has the advantages of convenient collection, stable signal, long communication distance and low cost.