A method for information interaction under small cell deployment, includes: a master evolved node B adding a candidate secondary evolved node B for a user equipment (S10); the master evolved node B interacting local home network information with the candidate secondary evolved node B via an inter-evolved node B interface (S20); the master evolved node B determining whether to use the candidate secondary evolved node B to provide the user equipment with a dual connectivity service (S30). The embodiments of the present document can provide a guarantee for selecting a standalone gateway to support a selected Internet Protocol (IP) traffic offload at local network (SIPTO@LN) service aiming at the dual connectivity service feature under small cell deployment. The embodiments of the present document further disclose an evolved node B working under small cell deployment