An interference measurement method for a communication system using a flexible duplex mode in which a transmission direction of transmission resources between a first base station and a first terminal (801-804; 1001-1004) located in a first cell and a transmission direction of transmission resources between a second base station and a second terminal located in a second cell neighboring the first cell is dynamically configured, the method comprising: sending, by the first base station, information, which indicates an interference measurement resource used for transmitting an interference measurement signal, to the first terminal and the second base station; sending, by the second base station, the information about the interference measurement resource to the second terminal; sending, by the first base station, information, which indicates a type and form of the interference measurement signal, to the first terminal and the second base station; sending, by the second base station, the information about the interference signal to the second terminal; sending, by the first terminal, the interference measurement signal on the interference measurement resource to the second terminal, wherein the interference measurement signal is a signal used by the second terminal to measure interference between links in different directions, and the different directions comprise a downlink direction between the first terminal and the first base station and an uplink direction between the second terminal and the second base station; measuring, by the second terminal, the interference measurement signal based on information about the interference measurement resource and information about the interference measurement signal, to obtain interference measurement signal strength; and controlling, by the second terminal based on the interference measurement signal strength, power at which the second terminal sends a data signal to the second base station. sending, by the first base station, information, which indicates an interference measurement resource used for transmitting an interference measurement signal, to the first terminal and the second base station; sending, by the second base station, the information about the interference measurement resource to the second terminal; sending, by the first base station, information, which indicates a type and form of the interference measurement signal, to the first terminal and the second base station; sending, by the second base station, the information about the interference signal to the second terminal; sending, by the first terminal, the interference measurement signal on the interference measurement resource to the second terminal, wherein the interference measurement signal is a signal used by the second terminal to measure interference between links in different directions, and the different directions comprise a downlink direction between the first terminal and the first base station and an uplink direction between the second terminal and the second base station; measuring, by the second terminal, the interference measurement signal based on information about the interference measurement resource and information about the interference measurement signal, to obtain interference measurement signal strength; and controlling, by the second terminal based on the interference measurement signal strength, power at which the second terminal sends a data signal to the second base station.