There is provided a method for controlling a first device by a control device using BLE (Bluetooth Low Energy) technology in a wireless communication system, the method comprises establishing a BLE connection with the first device; opening a control channel for controlling the first device; determining the first device and a specific control level to the first device, via the control channel, wherein the specific control level indicates a control authority to control the first device by the control device, wherein the specific control level is determined based on a required security level for the first device; and controlling a controllable operation for the first device based on the determined specific control level, wherein the controllable operation is defined based on the determined specific control level.