The steps to use AE to render text with a transparent background are as follows:
1. Create a new composition and use the Motion Factory-Typer Buider in AE to quickly generate text animation.
2. Press the shortcut key "Ctrl+M" to open the rendering queue and click "Output Module".
3. Select "QuickTime" as the format and "RGB+Alpha" as the channel.
4. Select the output location, click "Render", and the text animation can be output after rendering is completed.