The assessment of regional stability is a very complex and difficult systema tic engineering problem because it is affected not only by certain and uncertain factors, and known and unknown factors, but also by dynamic and nonlinear facto rs. Based on the preferred plane theory, this paper studies and discusses the in telligent system of assessment and co ntrol for regional stability by means of computer and intelligence technology and information technology, in combination with the geoengineering theory and structure controltheory.