Software project management is the key to the success of software development projects. Decisions and tasks in the software project management process include identifying software development objectives, specifying software requirements, designing software development work breakdown structure, organizing project team, estimating software development costs and risks, allocating project resources, scheduling software development works, controlling project qualities, documenting software development process, and diagnosing as well as solving project problems, ... etc. Carrying out the complete management and decision process efficiently and effectively need to integrate data, models, and knowledge about the project qualities, works, costs, labors, schedules, and tools, and to provide an user friendly graphical interactive software development and project management system environment. The goal of this research is to integrate object-oriented method, hypermedia technology, as well as expert decision support system approaches for the development and application of an intelligent software project management system environment. A prototyped software development cost estimation and risk evaluation system is also provided to validate the feasibilities of this research.