Smoke is considered the major reason for killing a lot of people in case of a building fire because of the reduction of visibility and asphyxiation fatalities that occurred in the smoke event. The present research illustrates a numerical simulation on smoke propagation and smoke control for the atrium in an administration building and investigates the effect of exhausting smoke by multi-point extraction through rooftop exhaust fans on smoke layer height inside the atrium. ANSYS-FLUENT solver is used to solving two-dimensional Reynolds-averaged Navier-Stokes equations (RANS) combined with K-ε Realizable turbulence model for different study cases in an atrium. The two-dimensional rectangular plan that is located at the center of the atrium is simulated with the dimensions of 25m width and 20m height using T-squared fire with the maximum heat release rate of 5 MW for 180 seconds. All parameters are predicted at vertical levels of 2, 13 and 17 m height from the ground floor. Results show that exhausting the smoke through rooftop exhaust fans maintains the smoke layer at a higher level from the ground and has a better effect on tenability conditions at the human level, increasing makeup air inlets levels adversely affect smoke layer height which reduces visibility at a human level. Finally, the spacing between extract fans outlet is considered a major factor that should be optimized in order to avoid the plug-holing phenomena.