Nowadays, in most of the organizations such as project-based organizations, outsourcing the projects and transferring the activities are followed by concentrating in core capabilities, reducing size, achieving the best performance, and controlling and transparency of costs. Since each of the outsourcing projects commits the responsibility of performing each part of the project activities to a contractor for a specific period of time and determined costs, this outsourcing process is it self considered as a project. Therefore, despite its numerous advantages, in some situations, it fails, and the most important reason for this failure is lack of using appropriate methods and techniques of management in risk assessment. As a result, the purpose of this paper is presenting a risk assessment model in outsourcing process using the analytic hierarchy process and PROMETHEE methods in fuzzy environment.