The present invention relates to an IoT-based parking lot sharing device and a parking lot sharing method connecting a shared parking space, and the parking lot sharing device according to the present invention provides information on a plurality of shared parking lots that can be shared and a parking lot. A registration unit for registering user information and vehicle information; Granting permission to classify available shared parking lots from among the shared parking lots based on the user's information and vehicle information and grant use rights; When the user's vehicle requests entry to any one of the shared parking lots and the access request signal is transmitted through the management server of the shared parking lot to be entered, the access to the parking lot is determined by checking the permission of use of the shared parking lot. Thus, it is provided with an authorization check unit provided to the management server.
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