An uplink, UL, listen before talk, LBT, channel detection method, wherein the method comprises: • before transmitting an UL grant, determining, by a base station based on a service priority in a buffer status report, BSR, of a user equipment scheduled in a self-contained subframe, a contention window required for performing LBT; • in a first alternative, performing, by the base station, the LBT based on the contention window, and after detecting that a channel is idle, transmitting, in the self-contained subframe through the channel, the UL grant corresponding to the user equipment, wherein the UL grant carries indication information used for indicating a category of LBT that needs to be performed by the user equipment; or in a second alternative instead of the first alternative, after detecting, by using the LBT, that the channel is idle, transmitting, by the base station in the self-contained subframe through the channel, the UL grant corresponding to the user equipment, wherein the UL grant carries information about the contention window and carries the indication information used for indicating the category of the LBT that needs to be performed by the user equipment (S 32); • characterized by, in the first and second alternative, if the indication information instructs the user equipment to perform category-1 LBT, after the transmitting, by the base station in the self-contained subframe through the channel, the UL grant corresponding to the user equipment, the method further comprises: ∘ sending, by the base station in a guard period, GP, of the self-contained subframe, data or a signal used for occupying the channel. • before transmitting an UL grant, determining, by a base station based on a service priority in a buffer status report, BSR, of a user equipment scheduled in a self-contained subframe, a contention window required for performing LBT; • in a first alternative, performing, by the base station, the LBT based on the contention window, and after detecting that a channel is idle, transmitting, in the self-contained subframe through the channel, the UL grant corresponding to the user equipment, wherein the UL grant carries indication information used for indicating a category of LBT that needs to be performed by the user equipment; or in a second alternative instead of the first alternative, after detecting, by using the LBT, that the channel is idle, transmitting, by the base station in the self-contained subframe through the channel, the UL grant corresponding to the user equipment, wherein the UL grant carries information about the contention window and carries the indication information used for indicating the category of the LBT that needs to be performed by the user equipment (S 32); • characterized by, in the first and second alternative, if the indication information instructs the user equipment to perform category-1 LBT, after the transmitting, by the base station in the self-contained subframe through the channel, the UL grant corresponding to the user equipment, the method further comprises: ∘ sending, by the base station in a guard period, GP, of the self-contained subframe, data or a signal used for occupying the channel.