The invention relates to the communication field, and discloses a base station access method and system based on cloud architecture; the access efficiency is improved, and the system load is lowered. The method comprises the following steps: a NEA server directly faces to a base station side to accomplish the interaction with multiple base stations, relatively a cloud server, the NEA server plays the agent effect; the cloud server is unnecessary to directly interact with multiple base stations; after the NEA server organizes the access request messages sent by the base stations, the cloud server directly receives a first configuration request message transmitted by the NEA server, and accomplishes the issuing of public configuration information, and further receives a second configuration request message sent by the NEA server and accomplishes the issuing of private configuration information. Therefore, the computation amount and the interaction frequency of the cloud server are greatly lowered, the operation efficiency is improved, the system load is lowered, and the base station opening efficiency is greatly improved, the operation and the maintenance are easy, the whole process is free from the manual intervention, and the automation is really realized.