A system for processing data, comprising: a terminal (301, 401, 1001), provided with a first edge computing module (302, 402, 1002), wherein the first edge computing module is configured to implement an edge computing function of the terminal, and the terminal supports a 5G-based relay communication technology from the terminal to the network; and a lower-layer terminal device (303, 403, 1011, 1012, 1013, 1014), configured to send a data processing request to the terminal through a Sidelink connection established between the terminal and the lower-layer terminal device; wherein 5G communication connection is supported by both the terminal and the lower-layer terminal device; wherein the terminal is configured to receive the data processing request; process the data processing request through the first edge computing module to obtain a first processed result; and send the first processed result through the Sidelink connection to the lower-layer terminal device; and wherein the lower-layer terminal device is configured to receive the first processed result through the Sidelink connection; characterized in that, the lower-layer terminal device is configured to send report information to the terminal, the report information is configured to indicate that the lower-layer terminal device has an independent communication capability; the terminal is configured to receive the report information; and send a connection instruction to the lower-layer terminal device in response that the first edge computing module cannot process the data processing request, in which the connection instruction is configured to instruct the lower-layer terminal device to establish an independent communication connection with an access network device, so that the access network device receives the data processing request. a terminal (301, 401, 1001), provided with a first edge computing module (302, 402, 1002), wherein the first edge computing module is configured to implement an edge computing function of the terminal, and the terminal supports a 5G-based relay communication technology from the terminal to the network; and a lower-layer terminal device (303, 403, 1011, 1012, 1013, 1014), configured to send a data processing request to the terminal through a Sidelink connection established between the terminal and the lower-layer terminal device; wherein 5G communication connection is supported by both the terminal and the lower-layer terminal device; wherein the terminal is configured to receive the data processing request; process the data processing request through the first edge computing module to obtain a first processed result; and send the first processed result through the Sidelink connection to the lower-layer terminal device; and wherein the lower-layer terminal device is configured to receive the first processed result through the Sidelink connection; characterized in that, the lower-layer terminal device is configured to send report information to the terminal, the report information is configured to indicate that the lower-layer terminal device has an independent communication capability; the terminal is configured to receive the report information; and send a connection instruction to the lower-layer terminal device in response that the first edge computing module cannot process the data processing request, in which the connection instruction is configured to instruct the lower-layer terminal device to establish an independent communication connection with an access network device, so that the access network device receives the data processing request.