An apparatus for Pseudo Wire Emulation Edge-to-Edge PWE3 access, the apparatus comprising: an emulation processing module and a data processing module, wherein the emulation processing module is configured to, after receiving non-Ethernet data transmitted by a local user, perform an inner layer PWE3 frame format encapsulation on the non-Ethernet data, and to transmit the encapsulated data to the data processing module; the emulation processing module is further configured to perform an inner layer PWE3 frame format de-encapsulation on data which is transmitted by the data processing module and which has been subjected to an outer layer L2VPN frame format de-encapsulation, and to transmit the de-encapsulated non-Ethernet data to the local user; the data processing module is configured to perform an outer layer L2VPN frame format encapsulation on the data which is transmitted by the emulation processing module and which has been subjected to the inner layer PWE3 frame format encapsulation, and to transmit the encapsulated data to an opposite Provider Edge device PE; the data processing module is further configured to, after receiving the data transmitted by the opposite PE, perform the outer layer L2VPN frame format de-encapsulation on the data, and to transmit the de-encapsulated data to the emulation processing module, wherein the inner layer PWE3 frame format encapsulation comprises: a first PW encapsulation, a PWE3 tunnel encapsulation, a first VLAN encapsulation, a first destination MAC address encapsulation and a first source MAC address encapsulation on the non-Ethernet data, wherein the first PW is a PW between the local user and an opposite user, the first destination MAC address is a MAC address of an opposite Customer Edge device CE, the first source MAC address is a MAC address of a local CE, wherein the outer layer L2VPN frame format encapsulation comprises a second PW encapsulation, an L2VPN tunnel encapsulation, a second VLAN encapsulation, a second destination MAC address encapsulation and a second source MAC address encapsulation on the encapsulated data which is transmitted by the emulation processing module and which has been subjected to the inner layer PWE3 frame format encapsulation, wherein the second PW is a PW between a local PE and the opposite PE, the second destination MAC address is a MAC address of the opposite PE, and the second source MAC address is a MAC address of the local PE. an emulation processing module and a data processing module, wherein the emulation processing module is configured to, after receiving non-Ethernet data transmitted by a local user, perform an inner layer PWE3 frame format encapsulation on the non-Ethernet data, and to transmit the encapsulated data to the data processing module; the emulation processing module is further configured to perform an inner layer PWE3 frame format de-encapsulation on data which is transmitted by the data processing module and which has been subjected to an outer layer L2VPN frame format de-encapsulation, and to transmit the de-encapsulated non-Ethernet data to the local user; the data processing module is configured to perform an outer layer L2VPN frame format encapsulation on the data which is transmitted by the emulation processing module and which has been subjected to the inner layer PWE3 frame format encapsulation, and to transmit the encapsulated data to an opposite Provider Edge device PE; the data processing module is further configured to, after receiving the data transmitted by the opposite PE, perform the outer layer L2VPN frame format de-encapsulation on the data, and to transmit the de-encapsulated data to the emulation processing module, wherein the inner layer PWE3 frame format encapsulation comprises: a first PW encapsulation, a PWE3 tunnel encapsulation, a first VLAN encapsulation, a first destination MAC address encapsulation and a first source MAC address encapsulation on the non-Ethernet data, wherein the first PW is a PW between the local user and an opposite user, the first destination MAC address is a MAC address of an opposite Customer Edge device CE, the first source MAC address is a MAC address of a local CE, wherein the outer layer L2VPN frame format encapsulation comprises a second PW encapsulation, an L2VPN tunnel encapsulation, a second VLAN encapsulation, a second destination MAC address encapsulation and a second source MAC address encapsulation on the encapsulated data which is transmitted by the emulation processing module and which has been subjected to the inner layer PWE3 frame format encapsulation, wherein the second PW is a PW between a local PE and the opposite PE, the second destination MAC address is a MAC address of the opposite PE, and the second source MAC address is a MAC address of the local PE.