An apparatus for laser processing a board is provided. The apparatus for laser processing a board includes a chip, a laser, a modulating device and a focus device. The chip receives a first frequency signal to generate a second frequency signal. The laser receives the first frequency signal to emit a first laser beam. The modulating device receives the second frequency signal and the first laser beam, and adjusts the first laser beam to emit a second laser beam. The focus device focuses the second laser beam to emit a third laser beam onto the board for forming plural dots on the board.