Provided is an operating method for acquiring system information which is to be performed by a terminal in a wireless communication system. The method comprises: transmitting, to a serving cell, a system information acquisition failure report message that requests the transmission of compulsory system information; operating a system based on the acquired compulsory system information upon the acquisition of the compulsory system information as a response to the system information acquisition failure report message; and performing a connection recovery upon the failure of the acquisition of the compulsory system information as a response to the system information acquisition failure report message.