Due to limitations in image resolution and viewing angles of the lens, ordinary image acquisition devices cannot capture images of super-large scenes. Image mosaicking techniques are used to produce panoramic images in such circumstances by registering and stitching a number of images with a limited perspective angle. We design an image mosaic system for this purpose. The first module is based on a phase correlation algorithm to realize real-time mosaicking of images with only translational relationship. The second module deals with images having both of rotational and translational relationships, which is based on Harris corner match. Experimental results show that the system can effectively achieve seamless image mosaicking.