Fuente: Wipo "IOT" An IoT edge system according to an aspect of the present invention is a system enabling resource sharing between IoT edges having a hierarchical structure, and comprises: a plurality of IoT devices, each of which registers a list of providable services in an IoT edge device in the same network, and receives and processes a service execution request from the IoT edge device; and a plurality of IoT edge devices, each including middleware which registers and manages services provided by an IoT device in the same network, configures whether to open the registered services, and determines whether to provide a service according to an access right in response to a service request from another IoT edge device. At this time, the plurality of IoT edge devices form a tree-shaped hierarchical structure. An IoT edge device having an upper layer transfers a list of opened services to an IoT edge device of the upper layer, and the IoT edge device of the upper layer has an access right to the services opened by the IoT edge device of the lower layer.