A method for selectively transporting a droplet in microchannels using surface acoustic wave was presented and a microdevice for selectively transporting the droplet was fabricated. The microdevice was comprised of a piezoelectric subdevice with two interdigital transducers on 128°YX-LiNbO3 substrate, a microclapboard and a poly(dimethylsiloxane)(PDMS) microchannel. The PDMS microchannel was fabricated by soft lithographic technology, and was divided into two sub-microchannels by the plastic microclapboard embedded into the microchannel. The PDMS microchannel was mounted onto the piezoelectric substrate. Together with paraffin oil in a microsyringe, surface acoustic wave, which was excited by the interdigital transducers, selectively transported the droplet to a target submicrochannel. Transporting experiments of a water droplet with red color were done. Results show that the droplet in the microchannel can be successfully transported to the target submicrochannel. The work is help for microfluidic analysis on a piezoelectric microfluidic device.