Summary: The relationship of Information Systems Planning (ISP) and Business Planning (BP) is a hot topic in strategic information systems era. The paper provides the conceptual model of integration stages of BP-ISP and its impact on the planning activities. Furthermore, the relationship among integrating stages, the status of ISP, ISP problems and BP activities are analyzed through empirical study using Chinese enterprises’ data collected by mailing. And Structure Equation Model (SEM) is used to testify the conceptual model. The results show that ISP goal, the role of CIO (chief information officer), the status of ISP and BP are related positively to the integration stage of BP-ISP, and ISP problems will be less if the stage is higher.