This paper introduces a novel approach for image edit. Instead of solving Poisson equation, image edit task can be treated as in painting the region of interest by propagating the boundary differences between target and source image. Based on the Fast Marching Method, differences along the boundary can be progressively eliminated to interior layer by layer, and we can get a seamless edit result. It is very simple to implement. Incorporating mixed saliency map, we further improve our edit model to achieve better and more realistic results for images with salient background structure. The experimental results are provided to demonstrate the performance of the algorithms.