This invention provides a power headroom report (PHR)
processing method and device, and a terminal and a
base station. The method comprises the steps of: determining that a triggering condition used for triggering the PHR is satisfied; and triggering the PHR according to the triggering condition. The triggering condition comprises at least one of: at a first time for sending and / or receiving data on an unauthorized carrier, a first
data scheduling time sent by the
base station is received, and a competition command which is sent by the
base station and used for competing for unauthorized carrier resource is received. By adoption of the method, the problem that the base
station cannot learn the PHR timely in the unauthorized carrier scene can be solved; and therefore, the PHR can be learnt in the unauthorized carrier scene timely.