Hematite (α-Fe2O3) nanotips have been successfully synthesized on a large area by thermal oxidation of iron film on indium tin oxide coated glass. The population density and aspect ratio of the α-Fe2O3 nanotips were controlled by varying preparation temperature in the range of 325–400 °C. The field emission properties of α-Fe2O3 nanotips prepared under different temperatures were studied. Uniform and stable emission was obtained. Considering the simple preparation method and scalability for large area preparation, the α-Fe2O3 nanotips could be a promising field emitter for field emission display application.