The invention provides an image rendering method and device. The method comprises that a first contour of a target object is obtained; contour vertexes positioned in the first contour are selected from vertexes of the target object; a second contour of the target object processed by a preset light source and preset illumination model is obtained; according to position information of the contour vertexes, a corresponding color is sampled in the second contour, and the stroke width corresponding to the contour vertexes is determined according to the sampled color; and according to the stroke width corresponding to the contour vertex, a stroke that connects the contour vertexes in series is generated, the stroke is rendered according to a predetermined rendering manner, and a rendered contour texture is obtained. The contour is rendered on the basis of the color of the illumination contour, the rendered contour can reflect illumination information, and a rendering effect is improved. The method and device can be realized in an image processor via a programmable pipeline, and the rendering efficiency is improved.