An embodiment of the present invention provides a method for controlling an access of a terminal in a wireless communication system. The method performed by the terminal comprises receiving, from a base station, system information comprising Application specific Congestion control for Data Communication (ACDC) barring information related to whether or not to allow an access of a specific ACDC category to which at least one application belongs; storing a priority level of an ACDC category of a first access request; checking whether there is a need of a second access request; checking whether the ACDC timer is running; and comparing the priority level of the ACDC category of the first access request with a priority level of an ACDC category of the second access request if the ACDC timer is running due to the stored priority level that caused the ACDC timer to start.