An information transmission method performed by a network device, wherein the method comprises: a.) determining (step 210), from a plurality of hybrid automatic repeat request, HARQ, timings, a first HARQ timing corresponding to a first service, among a plurality of services, of a terminal device, the terminal device being configured to use the plurality of services; and b.) sending (step 220) first downlink control information, DCI, corresponding to the first service to the terminal device, wherein the first HARQ timing is indicated by using a first radio network temporary identifier, RNTI, for scrambling the first DCI, the first RNTI being a RNTI among a plurality of RNTIs, wherein each RNTI among the plurality of RNTIs corresponds to a different HARQ timing among a plurality of HARQ timings; c.) performing in a first alternative the following method steps, wherein the first HARQ timing is a first downlink HARQ timing: ∘ determining, based on the first downlink HARQ timing and mapping relationship information, a first resource corresponding to the first downlink HARQ timing, wherein the mapping relationship information is information about a mapping relationship, wherein in the mapping relationship each HARQ timing among the plurality of HARQ timings corresponds to a resource; and ∘ receiving on the first resource first downlink HARQ feedback information corresponding to the first service from the terminal device; performing, in a second alternative instead of the first alternative, the following method steps, wherein the first HARQ timing is a first uplink HARQ timing: ∘ determining, based on the first uplink HARQ timing and the mapping relationship information, a first resource corresponding to the first uplink HARQ timing; and ∘ sending on the first resource first uplink HARQ feedback information corresponding to the first service to the terminal device. a.) determining (step 210), from a plurality of hybrid automatic repeat request, HARQ, timings, a first HARQ timing corresponding to a first service, among a plurality of services, of a terminal device, the terminal device being configured to use the plurality of services; and b.) sending (step 220) first downlink control information, DCI, corresponding to the first service to the terminal device, wherein the first HARQ timing is indicated by using a first radio network temporary identifier, RNTI, for scrambling the first DCI, the first RNTI being a RNTI among a plurality of RNTIs, wherein each RNTI among the plurality of RNTIs corresponds to a different HARQ timing among a plurality of HARQ timings; c.) performing in a first alternative the following method steps, wherein the first HARQ timing is a first downlink HARQ timing: ∘ determining, based on the first downlink HARQ timing and mapping relationship information, a first resource corresponding to the first downlink HARQ timing, wherein the mapping relationship information is information about a mapping relationship, wherein in the mapping relationship each HARQ timing among the plurality of HARQ timings corresponds to a resource; and ∘ receiving on the first resource first downlink HARQ feedback information corresponding to the first service from the terminal device; performing, in a second alternative instead of the first alternative, the following method steps, wherein the first HARQ timing is a first uplink HARQ timing: ∘ determining, based on the first uplink HARQ timing and the mapping relationship information, a first resource corresponding to the first uplink HARQ timing; and ∘ sending on the first resource first uplink HARQ feedback information corresponding to the first service to the terminal device. ∘ determining, based on the first downlink HARQ timing and mapping relationship information, a first resource corresponding to the first downlink HARQ timing, wherein the mapping relationship information is information about a mapping relationship, wherein in the mapping relationship each HARQ timing among the plurality of HARQ timings corresponds to a resource; and ∘ receiving on the first resource first downlink HARQ feedback information corresponding to the first service from the terminal device; ∘ determining, based on the first uplink HARQ timing and the mapping relationship information, a first resource corresponding to the first uplink HARQ timing; and ∘ sending on the first resource first uplink HARQ feedback information corresponding to the first service to the terminal device.