This paper presents an event-triggered switched model predictive control (MPC) for satellite attitude control system. The proposed scheme enhances the satellite's manoeuvrability over a wide operational area by extracting its model at different attitude angles and ensuring stability through model switching. In the developed switched model, the effects of quantization error and communication delay in the control commands are considered. Furthermore, by designing an event-driven mechanism, control activation is provided only at specific times without compromising stability. This ensures the controller is not continuously active, avoiding excessive occupancy of the satellite data bus. Accordingly, the proposed control scheme is formulated as a linear matrix inequality optimization problem to ensure the ultimate uniform boundedness of the satellite attitude angles and angular velocities. Also, a disturbance compensator is introduced to eliminate the effects of external disturbances, input quantization, and delay. Therefore, the region related to uniform ultimate boundedness converges towards zero, leading to a significant improvement in tracking accuracy. The simulation results demonstrate high accuracy and fast response over a wide operating range, with effective handling of disturbances. Moreover, the scheme significantly reduces the number of optimization problem executions, addressing processor limitations of space missions.