A remote resource access method, used to access a physical resource device separate from a computer system, wherein the computer system comprises at least one computing node, and the computer system and the physical resource device are connected by using a switching device; and the method comprises: obtaining (S101, S206), by the switching device, a first access message sent by a computing node, wherein the first access message is used to access a virtual resource device, and a destination address in the first access message is a virtual address of the virtual resource device; determining (S102, S207) a physical address of the physical resource device corresponding to the virtual resource device according to a preset mapping relationship between the virtual address of the virtual resource device and the physical address of the physical resource device, wherein the virtual resource device is a locally virtualized device of the physical resource device; converting (S103, S208) the first access message into a second access message, wherein a destination address in the second access message is the physical address of the physical resource device; and sending the second access message to the physical resource device by using a network, wherein the physical resource device comprises at least one physical resource (401, 402), characterized in that the switching device and the computer system are located in a same bus architecture, the remote physical resource device is a hardware device that is not in the same bus architecture as the computer system, and the method further comprises: obtaining a first interrupt request sent by the physical resource device to the computing node, wherein the first interrupt request carries the physical address of the physical resource device; determining the virtual address of the virtual resource device corresponding to the physical resource device according to the preset mapping relationship between the virtual address of the virtual resource device and the physical address of the physical resource device; converting the first interrupt request into a second interrupt request, wherein the second interrupt request carries the virtual address of the virtual resource device; and sending the second interrupt request to the computing node, so that the computing node accesses the virtual resource device according to the second interrupt request. obtaining (S101, S206), by the switching device, a first access message sent by a computing node, wherein the first access message is used to access a virtual resource device, and a destination address in the first access message is a virtual address of the virtual resource device; determining (S102, S207) a physical address of the physical resource device corresponding to the virtual resource device according to a preset mapping relationship between the virtual address of the virtual resource device and the physical address of the physical resource device, wherein the virtual resource device is a locally virtualized device of the physical resource device; converting (S103, S208) the first access message into a second access message, wherein a destination address in the second access message is the physical address of the physical resource device; and sending the second access message to the physical resource device by using a network, wherein the physical resource device comprises at least one physical resource (401, 402), characterized in that the switching device and the computer system are located in a same bus architecture, the remote physical resource device is a hardware device that is not in the same bus architecture as the computer system, and the method further comprises: obtaining a first interrupt request sent by the physical resource device to the computing node, wherein the first interrupt request carries the physical address of the physical resource device; determining the virtual address of the virtual resource device corresponding to the physical resource device according to the preset mapping relationship between the virtual address of the virtual resource device and the physical address of the physical resource device; converting the first interrupt request into a second interrupt request, wherein the second interrupt request carries the virtual address of the virtual resource device; and sending the second interrupt request to the computing node, so that the computing node accesses the virtual resource device according to the second interrupt request. obtaining a first interrupt request sent by the physical resource device to the computing node, wherein the first interrupt request carries the physical address of the physical resource device; determining the virtual address of the virtual resource device corresponding to the physical resource device according to the preset mapping relationship between the virtual address of the virtual resource device and the physical address of the physical resource device; converting the first interrupt request into a second interrupt request, wherein the second interrupt request carries the virtual address of the virtual resource device; and sending the second interrupt request to the computing node, so that the computing node accesses the virtual resource device according to the second interrupt request.