A locking system includes a communication unit, a key including a first unique information, the key being capable of wirelessly connecting to the communication unit, a mobile device including a second unique information, the mobile device being capable of wirelessly connecting to the communication unit, a first verification unit that verifies the first unique information, a locking device configured to lock and unlock the space, a locking device controller that controls the locking device, a biometric information acquisition unit that acquires biometric information capable of identifying an individual, and a second verification unit that verifies the second unique information and the biometric information. After the first unique information and the second unique information are verified, the biometric information is verified, the space is unlocked when the acquired biometric information matches, and the space is locked or maintained in a locked state when the acquired biometric information does not match.