Controller, computing device, bios recovery and backup method and security profile setting method

A controller used in a computing device, configured to control a switcher to allow a platform controller hub to access a storage device via the switcher, comprising:

• a storage unit, configured to store a firmware, a first security key and a piece of security profile configuration;
• an input/output interface, electrically connected to the switcher;
• and
• a processing unit, configured to read the firmware when the computing device boots, so as to execute at least steps as follows:
• using the first security key to verify a security profile stored in the storage device when the storage device connects to an input/output interface;
• using an operation mode profiled by the security profile according to the security profile configuration when successfully verifying the security profile stored in the storage device;
• completing booting of the computing device when the operation mode is a non-secure mode;
• using at least one basic input/output system (BIOS) stored in the storage device to recover a main BIOS and rebooting the computing device when the operation mode is a high-secure mode or a multiple-backup mode and the main BIOS in the computing device is invalid;
• and
• backing up and storing the main BIOS to the storage device when the operation mode is the high-secure mode or the multiple-backup mode and the main BIOS is valid but does not store in the storage device.