In view of the development of the solidification science and practice, the present paper introduces the basic framework of the current solidified materials system and the basic principles in main developing stages of solidification science. On the basis of modern science and in connection with the modification and improvement of traditional materials, and the developing requirement of new materials, solidification science and technology, as part of the basic component of material science and engineering is carrying out in wide scale research and development in the fields of high-quality castings, directional solidification, crystal growth, rapid solidification, solidification of melt supercooling and other new type and extraordinary solidification processes aiming at precisely controlling structure, shape and properties of products. In this paper some of the above-mentioned work is also described and the developing trend is reviewed.