A method for acquiring system information in a wireless communication system, the method performed by a user equipment, UE, wherein the UE is in a radio resource control, RRC, connection state with a network and is configured with a restricted measurement configuration by the network, the method comprising: starting a first timer which is set to a first specific value; attempting (S1130, S1250), from a first primary cell, PCell, to acquire compulsory system information via a broadcast while the first timer is running, wherein the compulsory system information comprises a master information block, MIB, a system information block 1, SIB 1, and a system information block 2, SIB 2; determining whether the compulsory system information is acquired by a broadcast from the PCell while the first timer is running; transmitting, to the first PCell, a system information acquisition failure report message which indicates that acquisition of the MIB by the broadcast is failed, when the MIB has not been acquired while the first timer is running; if the MIB has not been acquired while the first timer is running, and the network allows the UE to acquire the compulsory system information at a specific time interval through an indicator included in broadcast signaling or dedicated signaling, the method further comprising: starting a second timer which is set to a second specific value when the system information acquisition failure report message is transmitted; attempting, from the first PCell, to acquire the MIB via dedicated signaling while the second timer is running; and performing (S1170, S1271) a connection recovery with a cell, to which an RRC connection reestablishment request message is transmitted by the UE, when the acquisition of the MIB or the SIB 1 by the dedicated signaling is failed until the second timer which is set to the second specific value is terminated. starting a first timer which is set to a first specific value; attempting (S1130, S1250), from a first primary cell, PCell, to acquire compulsory system information via a broadcast while the first timer is running, wherein the compulsory system information comprises a master information block, MIB, a system information block 1, SIB 1, and a system information block 2, SIB 2; determining whether the compulsory system information is acquired by a broadcast from the PCell while the first timer is running; transmitting, to the first PCell, a system information acquisition failure report message which indicates that acquisition of the MIB by the broadcast is failed, when the MIB has not been acquired while the first timer is running; if the MIB has not been acquired while the first timer is running, and the network allows the UE to acquire the compulsory system information at a specific time interval through an indicator included in broadcast signaling or dedicated signaling, the method further comprising: starting a second timer which is set to a second specific value when the system information acquisition failure report message is transmitted; attempting, from the first PCell, to acquire the MIB via dedicated signaling while the second timer is running; and performing (S1170, S1271) a connection recovery with a cell, to which an RRC connection reestablishment request message is transmitted by the UE, when the acquisition of the MIB or the SIB 1 by the dedicated signaling is failed until the second timer which is set to the second specific value is terminated. starting a second timer which is set to a second specific value when the system information acquisition failure report message is transmitted; attempting, from the first PCell, to acquire the MIB via dedicated signaling while the second timer is running; and performing (S1170, S1271) a connection recovery with a cell, to which an RRC connection reestablishment request message is transmitted by the UE, when the acquisition of the MIB or the SIB 1 by the dedicated signaling is failed until the second timer which is set to the second specific value is terminated.