Most construction management focuses on the quality management during the construction period but overlooks project management in the planning and design as well as supervision stages. This research is aimed to study how to apply the project management to the interior decoration engineering project. Literature review and questionnaire survey were performed to establish the optimum model and strategy for interior decoration project management. Delphi method and the analytic hierarchy process (AHP) were also applied to identify the key factors in interior decoration project management. Good quality management, comprehensive "and" project planning, proper organizational structure etc are the key factors affecting the success of interior decoration engineering project. Through the project management, integration of various technical and financial resource and suitable decision-making, cost will be reduced and good quality will be obtained for inferior decoration engineering project.