Have copied the Fedora Virtualbox image from another computer, failed to boot up, changed the /etc/fstab configuration file, problem resoled.
The problem shows as below screen shot, it enters into the emergency mode, after input the password, can enter the command line,
displays as below screenshot, fsck failed with error.
Check the /etc/fstab file, the error caused boot disk point to the UUID number, as below screenshot shows,
command to check the disk usage,
the boot should point to /dev/sda1,
Change the /etc/fstab, comment out UUID line, added one additional line,
/dev/sda1 /boot ext4 defaults 1 2
as below screenshot shows,
Command mount -a to mount the boot disk, mount command to check the result, as below screenshot show, reboot the Virtualbox, problem resolved.