Heat removing method and device as well as heat adding method and device for CPUs

Embodiments of the invention relate a heat removing method and device as well as a heat adding method and device for CPUs. The heat removing method for central processing units CPU is suitable for the servers with non-fully connected first CPU topologies, and comprises the following steps: determining a first CPU in a plurality of CPUs by a controller, wherein the first CPU is a CPU which has an error or which needs to be removed according to first indication information, and the first indication information is from the first CPU topology or a user interface; determining at least one second CPU, according with a preset condition with the first CPU, in the plurality of CPUs by the controller; sending second indication information to the first CPU topology by the controller; and after receiving the second indication information by the first CPU topology, removing the first CPU and the at least one second CPU so as to obtain a second CPU topology, and operating the second CPU topology. Through heating removing method for CPUs, the online removal of the CPUs can be realized, and in and after the removal of the CPUs, the systems can work normally, so that the user experience is enhanced.