A method for detecting a cell identity conflict, comprising: determining (201; 301) that a user equipment accesses a first cell or performs connection establishment or connection re-establishment in a first cell at a first time point T1; searching (202; 302) whether interaction information related to the user equipment exists in other cells except the first cell near the first time point T1, wherein the interaction information is used to record last contact information between the user equipment and the other cells, wherein the last contact information comprises last signaling or data interacted between the user equipment and the other cells and a second time point T2 corresponding to the last signaling or data, wherein the second time point T2 is a time point when the last signaling or data is received, and the searching (202; 302) whether interaction information related to the user equipment exists in other cells except the first cell near the first time point T1 comprises: if it is satisfied that T1 - ΔT1 ≤ T2 ≤ T1 + ΔT2, determining that a cell corresponding to the interaction information is a second cell, wherein ΔT1 and ΔT2 are predetermined thresholds; and performing (203; 308) cell identity conflict detection on the first cell and the second cell when it is found, through the searching, that the interaction information related to the user equipment exists in the second cell among the other cells near the first time point T1, wherein the performing (203; 308) cell identity conflict detection on the first cell and the second cell comprises: determining whether the first cell and the second cell have a same cell identity if the first cell and the second cell have a same frequency point, wherein the frequency point of a cell is a central frequency configuration of the cell; and if the first cell and the second cell have the same cell identity, detecting that a cell identity conflict occurs between the first cell and the second cell. determining (201; 301) that a user equipment accesses a first cell or performs connection establishment or connection re-establishment in a first cell at a first time point T1; searching (202; 302) whether interaction information related to the user equipment exists in other cells except the first cell near the first time point T1, wherein the interaction information is used to record last contact information between the user equipment and the other cells, wherein the last contact information comprises last signaling or data interacted between the user equipment and the other cells and a second time point T2 corresponding to the last signaling or data, wherein the second time point T2 is a time point when the last signaling or data is received, and the searching (202; 302) whether interaction information related to the user equipment exists in other cells except the first cell near the first time point T1 comprises: if it is satisfied that T1 - ΔT1 ≤ T2 ≤ T1 + ΔT2, determining that a cell corresponding to the interaction information is a second cell, wherein ΔT1 and ΔT2 are predetermined thresholds; and performing (203; 308) cell identity conflict detection on the first cell and the second cell when it is found, through the searching, that the interaction information related to the user equipment exists in the second cell among the other cells near the first time point T1, wherein the performing (203; 308) cell identity conflict detection on the first cell and the second cell comprises: determining whether the first cell and the second cell have a same cell identity if the first cell and the second cell have a same frequency point, wherein the frequency point of a cell is a central frequency configuration of the cell; and if the first cell and the second cell have the same cell identity, detecting that a cell identity conflict occurs between the first cell and the second cell. if it is satisfied that T1 - ΔT1 ≤ T2 ≤ T1 + ΔT2, determining that a cell corresponding to the interaction information is a second cell, wherein ΔT1 and ΔT2 are predetermined thresholds; and performing (203; 308) cell identity conflict detection on the first cell and the second cell when it is found, through the searching, that the interaction information related to the user equipment exists in the second cell among the other cells near the first time point T1, wherein the performing (203; 308) cell identity conflict detection on the first cell and the second cell comprises: determining whether the first cell and the second cell have a same cell identity if the first cell and the second cell have a same frequency point, wherein the frequency point of a cell is a central frequency configuration of the cell; and if the first cell and the second cell have the same cell identity, detecting that a cell identity conflict occurs between the first cell and the second cell. determining whether the first cell and the second cell have a same cell identity if the first cell and the second cell have a same frequency point, wherein the frequency point of a cell is a central frequency configuration of the cell; and if the first cell and the second cell have the same cell identity, detecting that a cell identity conflict occurs between the first cell and the second cell.