Access handling method, device and system

The invention discloses an access handling method, a device and a system. The method comprises the following steps that: a terminal acquires a signaling which is transmitted from the network side to indicate the access handling; the terminal acquires a reason for the access handling from the signaling; and the terminal transmits the reason to a non-access layer to perform the access handling. Through the method, the device and the system, the robustness of the network can be improved.