The nanoflakes of Bismuth Tungstate (Bi₂WO₆) were successfully synthesized by a one-step facile hydrothermal route without using any templates or surfactants and field emission investigations of the Bi₂WO₆ nanoflakes emitter are reported. Structural and morphological analysis of as-synthesized Bi₂WO₆ nanoflakes has been carried out using X-ray diffraction (XRD) and scanning electron microscope (SEM). Moreover, the field emission characteristics of the Bi₂WO₆ nanoflakes are found to be superior to the other semiconductor emitters. The synthesized Bi₂WO₆ nanoflakes emitter delivers current density of ~222.35 μA/cm² at an applied electric field of ~7.2 V/μm. The emission current stability investigated at pre-set value of ~2 μA is observed to be fairly good. These observed results demonstrate potential candidate of the Bi₂WO₆ cathode as an electron source for practical applications in vacuum microelectronic device.