Disclosed are a self-organizing network (SON) method in an Internet of things (IoT) environment, and an apparatus performing the SON method. The SON method includes receiving neighboring device information from at least one neighboring IoT device of an IoT device, updating device information of the IoT device based on the received neighboring device information, and determining whether the IoT device is a coordinator candidate based on at least one of a number of network interfaces, a number of neighbor links connected to the network interfaces, or a ratio of remaining energy, which is included in the device information.