A method for implementing a Mobile-Edge Computing, MEC, service, characterized in that, the method comprises: performing, by a core network node, an MEC function; wherein the core network node performing the MEC function comprises: performing, by the core network node, information collection, wherein the core network node performing the information collection comprises at least one of: acquiring, from a Home Location Register, HLR, or a Home Subscriber Server, HSS, information on subscription related to a first User Equipment, UE, and the information on subscription related to the first UE comprising a capability of the first UE and/or a type of the first UE; or acquiring, via an interface between the core network node and a first Radio Access Network, RAN, node, at least one of information on a first base station or information on a first cell, the information on the first base station comprising a capability of the first base station, and the information on the first cell comprising a capability of the first cell managed by a second base station, information on a load of the first cell, and/ or information on a bandwidth of the first cell; and performing, by the core network node, local service caching which comprises reallocating Quality of Service, QoS, and/or a priority of a service cached by an MEC server deployed on the core network node according to information collected. performing, by a core network node, an MEC function; wherein the core network node performing the MEC function comprises: performing, by the core network node, information collection, wherein the core network node performing the information collection comprises at least one of: acquiring, from a Home Location Register, HLR, or a Home Subscriber Server, HSS, information on subscription related to a first User Equipment, UE, and the information on subscription related to the first UE comprising a capability of the first UE and/or a type of the first UE; or acquiring, via an interface between the core network node and a first Radio Access Network, RAN, node, at least one of information on a first base station or information on a first cell, the information on the first base station comprising a capability of the first base station, and the information on the first cell comprising a capability of the first cell managed by a second base station, information on a load of the first cell, and/ or information on a bandwidth of the first cell; and performing, by the core network node, local service caching which comprises reallocating Quality of Service, QoS, and/or a priority of a service cached by an MEC server deployed on the core network node according to information collected. performing, by the core network node, information collection, wherein the core network node performing the information collection comprises at least one of: acquiring, from a Home Location Register, HLR, or a Home Subscriber Server, HSS, information on subscription related to a first User Equipment, UE, and the information on subscription related to the first UE comprising a capability of the first UE and/or a type of the first UE; or acquiring, via an interface between the core network node and a first Radio Access Network, RAN, node, at least one of information on a first base station or information on a first cell, the information on the first base station comprising a capability of the first base station, and the information on the first cell comprising a capability of the first cell managed by a second base station, information on a load of the first cell, and/ or information on a bandwidth of the first cell; and performing, by the core network node, local service caching which comprises reallocating Quality of Service, QoS, and/or a priority of a service cached by an MEC server deployed on the core network node according to information collected.