A computer, a method and apparatus for controlling quality of service (QoS), where the method comprises allocating, to at least one container of the computer, a container identity (ID), sending a bus request to a system bus, searching, according to the bus request, for a QoS parameter corresponding to both the container ID and a hardware device ID, and configuring, according to the found QoS parameter, a resource required when the container corresponding to the QoS parameter uses the hardware device corresponding to the QoS parameter. Hence, the system bus may perform corresponding QoS control according to the QoS parameter corresponding to both the container ID and the hardware device ID such that the hardware device allocated to the container can meet resource requirements of a process group in the container.