A technical solution for accurately positioning a computer position, that is to say, the solution can identify the specific rack position where the computer is. And the solution has low cost and does not need manual intervention. The core idea of the solution lies in using a camera installed on the computer to read the contents of a tag on the rack, so as to identify the position information of the computer. Specifically, the solution provides a computer with a self-positioning function, wherein: a camera is installed on the computer, and the camera is configured to read the contents of a tag attached on a side of a rack to house the computer to identify the rack position where the computer is.