The invention discloses an ascending precoding indication information descending feedback method, which is characterized in that E-PCICHs (Enhanced Common Pilot Channels) for bearing ascending diversity precoding indicating information are arranged. The ascending precoding indication information descending feedback method comprises the following steps: network equipment respectively distributes one E-PCICH for each ascending diversity precoding indication information bit of UE (User Equipment) and indicating a channel code and feature code sequence index corresponding to the E-PCICH; the network equipment feeds back the ascending diversity precoding indicating information according to the indication of the channel code and feature code sequence index; and the UE receives the ascending diversity precoding indication information according to the indication of the channel code and feature code sequence index. The invention simultaneously discloses an ascending precoding indication information descending feedback device, a system and a receiving device for realizing the method. According to the invention, by effectively utilizing the existing channel design format, E-PCICHs of a plurality of UE and E-RGCHs (Enhanced Relative Grant Channels) share 40 feature codes of one channel code, so that the change of the existing protocol and the system is smaller.