You can connect the ipad to your computer with a data cable, then click to open the iTunes software on your computer and click the "ipad" option. When iTunes detects a connected ipad, an automatically updated page will pop up.
If the update interface does not pop up on the computer, you can click "Check for updates" in the summary interface of the ipad to detect the available updates of the device, and then download, upgrade and install according to the prompts. After installation, it can solve the problem that the ipad version is too low and the software cannot be updated.
2. Update directly from the settings.
If you can't connect the ipad and the computer with a data cable, you can directly connect the wifi at home with the ipad. After the connection is successful, click the "Settings" icon on the ipad desktop, enter the "Settings" interface to find "General" and click to enter, and enter the "General" interface to find "Software Update" for system detection and update.
If the ipad needs to update its system, please follow the prompts to download, upgrade and install it. After installation, it can solve the problem that the ipad version is too low and the software cannot be updated.