Embodiments of the present invention provide a master-slave base station cluster, a central unit, a remote unit, and an information processing method. The master-slave base station cluster includes: a central unit and at least one remote unit, where each remote unit is connected to the central unit through a remote interface; the central unit includes: at least one of a MAC layer function module, an RLC layer function module, a PDCP layer function module, and an RRC function module, and a first interface function module; and each remote unit includes: a second interface function module, an L1 layer function module, and another function module of the MAC layer function module, the RLC layer function module, the PDCP layer function module, and the RRC function module except the function module included in the central unit.