A measurement gap determination method, comprising: receiving, by a User Equipment, UE (11, 500), measurement configuration information transmitted from a network side device (12, 600), characterized in that the measurement configuration information is measurement configuration information of a Synchronization Signal, SS, block actually transmitted on at least one Bandwidth Part, BWP, and the UE (11, 500) operates at BWP on which no SS block is transmitted when the UE (11, 500) receives the measurement configuration information; determining, by the UE (11, 500), a measurement gap for measurement of the SS block on the at least one BWP in accordance with the measurement configuration information; and measuring, by the UE (11, 500), the SS block on the at least one BWP in the measurement gap, wherein the measurement configuration information comprises at least one of: an index of each of the at least one BWP on which the SS block is actually transmitted, a frequency position of each of the at least one BWP on which the SS block is actually transmitted, and a transmission configuration of the SS block actually transmitted on each of the at least one BWP; wherein the transmission configuration comprises at least one of: an index of the actually-transmitted SS block in a SS block set, a time position of the actually-transmitted SS block in the SS block set, a transmission period of the SS block set, a time offset of the SS block set, a carrier spacing of the SS block, and a Cyclic Prefix, CP, of the SS block, wherein the SS block set is a SS block set to which each SS block actually transmitted on the at least one BWP belongs. receiving, by a User Equipment, UE (11, 500), measurement configuration information transmitted from a network side device (12, 600), characterized in that the measurement configuration information is measurement configuration information of a Synchronization Signal, SS, block actually transmitted on at least one Bandwidth Part, BWP, and the UE (11, 500) operates at BWP on which no SS block is transmitted when the UE (11, 500) receives the measurement configuration information; determining, by the UE (11, 500), a measurement gap for measurement of the SS block on the at least one BWP in accordance with the measurement configuration information; and measuring, by the UE (11, 500), the SS block on the at least one BWP in the measurement gap, wherein the measurement configuration information comprises at least one of: an index of each of the at least one BWP on which the SS block is actually transmitted, a frequency position of each of the at least one BWP on which the SS block is actually transmitted, and a transmission configuration of the SS block actually transmitted on each of the at least one BWP; wherein the transmission configuration comprises at least one of: an index of the actually-transmitted SS block in a SS block set, a time position of the actually-transmitted SS block in the SS block set, a transmission period of the SS block set, a time offset of the SS block set, a carrier spacing of the SS block, and a Cyclic Prefix, CP, of the SS block, wherein the SS block set is a SS block set to which each SS block actually transmitted on the at least one BWP belongs.