To use a remote control system for a building hoist, first ensure that the hoist is properly installed and inspected for safety. Turn on the hoist's power supply and ensure the remote control is synced with the hoist. Familiarize yourself with the control panel, which typically includes buttons for up, down, stop, and emergency stop. Operate the hoist by pressing the up or down buttons to lift or lower the load. Always monitor the load's movement and communicate with workers on site. Use the stop button to halt the hoist if needed, and the emergency stop button in case of an immediate hazard. Regularly check the hoist's operation and maintain the remote control system to ensure smooth and safe operation.