A piece of ITO glass is used as the source electrode of a field-effect transistor. Two pieces of plastic aluminum flake with same thickness are pasted on the glass as gate and drain electrodes. A small and parallel gap between two pieces of aluminum pin is left. Teflon films are wiped on the glass of source, gate and drain electrodes as hydrophobic layers. Epoxide resin is used as cofferdam material so a new liquid field-effect transistor (LiquiFET) is produced based on electrowetting on dielectric (EWOD) effect. The displacement of colored oil drop is adjusted by changing the voltages of drain electrodes. And the current changes of source and gate electrodes are controlled. A liquid field-effect transistor is fabricated and its preliminary test results are given.