With the development of the application of information systems (IS) in business, there is a tendency to integrate business strategy planning (BSP) and information system strategy planning (ISSP) based on the varied market environment. The different processes and approaches of integrating BSP& ISSP such as bottom up approach, top down approach, inside out approach and meddle out approach have been reviewed and analyzed in the paper. Furthermore, to meet the requirement of the revolution time,the overall framework of integrating BSP and ISSP，which considers the alignment from a systematic per— spective，is proposed．Finally，the amended Portfolio Model is discussed and the suitable methods are given in accordance with the different integration approaches．