An enhanced physical downlink control channel, EPDCCH, candidate determining method, used in a cross-carrier scheduling process, wherein an EPDCCH candidate on at least two carriers is located on an EPDCCH resource set on one carrier among the at least two carriers, an aggregation level of the EPDCCH is L, and L>=1, the method comprising: determining the EPDCCH resource set p in a subframe k, wherein the EPDCCH resource set p comprises q resource block pairs, each of the resource block pairs corresponds to r enhanced control channel elements, ECCEs, q>=1, r>=1, N ECCE,p,k =q×r indicates the number of ECCEs in the EPDCCH resource set p, reference numerals of the N ECCE,p,k ECCEs are 0, 1, 2,..., N ECCE,p,k -1 respectively, an EPDCCH candidate of the EPDCCH at the aggregation level L corresponds to L ECCEs having consecutive reference numerals, and an EPDCCH candidate is capable of carrying an EPDCCH; and determining the number of EPDCCH candidates at the aggregation level L of a carrier corresponding to an index Cellindex and an ECCE corresponding to each EPDCCH candidate, wherein the ECCE corresponding to each EPDCCH candidate at the aggregation level L is related to the index Cellindex; wherein the determining the number of EPDCCH candidates comprises obtaining an ECCE corresponding to an m th EPDCCH candidate according to the following formula: L Y p, k + ⌊ m ′ • N ECCE, p, k L • M p L ⌋ + n Cellindex mod ⌊ N ECCE, p, k / L ⌋ + i wherein Y p,k is a random value related to subframe number k and the EPDCCH resource set p, p and k are both integers, M p L is the number of EPDCCH candidates, of a user equipment, UE, corresponding to the EPDCCH candidate, corresponding to the aggregation level L of the EPDCCH resource set p, 0<=i<=L-1, 0 < = m < = M p L − 1, and n Cellindex is a predefined candidate offset of the carrier corresponding to the index Cellindex. determining the EPDCCH resource set p in a subframe k, wherein the EPDCCH resource set p comprises q resource block pairs, each of the resource block pairs corresponds to r enhanced control channel elements, ECCEs, q>=1, r>=1, N ECCE,p,k =q×r indicates the number of ECCEs in the EPDCCH resource set p, reference numerals of the N ECCE,p,k ECCEs are 0, 1, 2,..., N ECCE,p,k -1 respectively, an EPDCCH candidate of the EPDCCH at the aggregation level L corresponds to L ECCEs having consecutive reference numerals, and an EPDCCH candidate is capable of carrying an EPDCCH; and determining the number of EPDCCH candidates at the aggregation level L of a carrier corresponding to an index Cellindex and an ECCE corresponding to each EPDCCH candidate, wherein the ECCE corresponding to each EPDCCH candidate at the aggregation level L is related to the index Cellindex; wherein the determining the number of EPDCCH candidates comprises obtaining an ECCE corresponding to an m th EPDCCH candidate according to the following formula: L Y p, k + ⌊ m ′ • N ECCE, p, k L • M p L ⌋ + n Cellindex mod ⌊ N ECCE, p, k / L ⌋ + i wherein Y p,k is a random value related to subframe number k and the EPDCCH resource set p, p and k are both integers, M p L is the number of EPDCCH candidates, of a user equipment, UE, corresponding to the EPDCCH candidate, corresponding to the aggregation level L of the EPDCCH resource set p, 0<=i<=L-1, 0 < = m < = M p L − 1, and n Cellindex is a predefined candidate offset of the carrier corresponding to the index Cellindex.