Embodiments of the present invention relate to wireless communication technology field, especially relate to a method, system and apparatus for power headroom report, for the use of power headroom report when a User Equipment (UE) aggregates carriers under different enhanced NodeBs (eNBs). Embodiments of the present invention provide a method for power headroom report, including: a user equipment which aggregates resources of multiple network equipment determines power headroom information; said user equipment sends said power headroom information to at least one of the network equipment participating in aggregation. Because the user equipment which aggregates resources of multiple network equipment reports the power headroom information to at least one of the network equipment participating in aggregation, sequentially the power headroom information is enabled to be reported when the UE aggregates carriers under different eNBs, multiple eNBs further can obtain the power headroom information in the case of inter-eNBs-aggregation, and resource scheduling is enabled.