Abstract: Mosaic is originally used in architecture. As the digital publishing age comes, a number of specialists emphasize that knowledge should be broken into fragments for convenient usage. However, to break up knowledge is mere a process, not a purpose. Some measure must be taken to piece all of the fragments up for individualized construction of one's own knowledge system. This paper introduces the concept of mosaic into communication study and brings forward some principles of mosaicking one's fragment information into a whole knowledge system