A method for configuring a radio bearer includes: sending by a central unit protocol partitioning information for the radio bearer to be configured to a target distributed unit, in which the protocol partitioning information indicates an assignment of each protocol layer of a radio-side protocol stack between the central unit and the target distributed unit; configuring a first protocol stack by the target distributed unit according to the protocol partitioning information; sending by the target distributed unit configuration information of the first protocol stack to the central unit; and configuring a second protocol stack by the central unit according to the configuration information of the first protocol stack.