The invention provides a method and device for using system resources in a memory. The method comprises the following steps of: acquiring an access request for a client operating system to use the system resources; and positioning the access request in a physical memory in which virtual system resources are stored while the access request is processed by the virtual system resources so as to process the access request by the virtual system resources. The scheme provided by the invention can make a guest operating system (GOS) effectively use the system resources and meet the requirements of the GOS so as to improve system compatibility and stability.