A method for determining location of a short-circuit point in a raster device comprises: applying a first DC voltage signal to a common electrode layer in the raster device; applying a second DC voltage signal to only first transparent electrodes in the raster device, or a second DC voltage signal to only second transparent electrodes in the raster device, or a second DC voltage signal to both the first transparent electrodes and the second transparent electrodes in the raster device, an absolute value of a difference between a voltage value of the first DC voltage signal and a voltage value of the second DC voltage signal being not lower than a liquid crystal deflection threshold voltage value (501); acquiring grayscale values of corresponding display areas in the raster device and determining the location of the short-circuit point according to the acquired grayscale values (502). The method provides a solution for determining the location of the short-circuit point which is in contact with the first transparent electrode and the second transparent electrode simultaneously.