Integration is one of the essential problems in software engineering support environment construction. It involves concepts, methodologies, techniques and tools. The integration has its logical meaning and physical attributes. In this paper, the architecture of an integrated software engineering support environment hosted by UNIX system was introduced. In this environment, the information base and the user-interface were designed as its main integration mechanisms. It can support object-oriented programming.This environment offers a series of base languages based on C and assist different users in software development and project management.The whole environment was divided into the environmrnt layer,the object layer and the data layer so that it was organized as a layered virtual machine.Therefore,this implementation makes the environment robust,open-ended and tailorable.