In order to solve the technical problem in the prior art that different spatial correlation modes are applicable for the transmission antennas in the base station under different working modes is not considered, the present invention provides a method and device for selecting the antenna at the base station. Wherein, the spatial correlation mode information among the multiple transmission antenna elements is determined by the base station according to the working mode; then, multiple transmission antenna elements are selected from several antenna elements to transmit the signal, according to the spatial correlation mode information. With the solution in the present invention, the base station may flexibly choose channel characteristic of strong spatial correlation and/or high DoF. When the base station is working under a closed-loop mode, transmission antennas may be selected to satisfy the strong spatial correlation, thereby the feedback over-head is reduced, and the robustness against the feedback delay is increased, and the quantization error is reduced. When the base station is working under an open-loop mode, transmission antennas may be selected to satisfy the weak spatial correlation, thereby the spatial DoF is increased, and the diversity and/or multi-plexing gain is introduced.