Magnetic refrigeration is a cooling technology based on the magnetocaloric effect. This technique can be used to provide extremely low temperatures, as well as the ranges used in common refrigerators, depending on the system design. Magnetic refrigeration at room temperature is considered highly efficient and environmentally benign method. It offers a great potential to substitute for the traditional vapor compression technology. In this study, a comprehensive thermodynamic analysis of active magnetic refrigeration system is carried out through energy and exergy. In this regard, a simulation code is developed using an Engineering Equation Solver (EES).In the modeling, some dimensionless quantities are introduced. Also, temperature distributions, cooling loads, and energy and exergy efficiencies of the system are studied and compared for various cases. To enhance the understanding of the process, a complete parametric study is performed to investigate the variations of operating conditions and state properties on the system efficiency.