1. A smart terminal fuzzing method using a multi-node structure, comprising: generating, by a smart terminal fuzzing apparatus, a plurality of fuzzing nodes that are to perform fuzzing on a plurality of smart terminals, respectively; making a connection to a fuzzing client corresponding to the plurality of fuzzing nodes; creating fuzzing commands to be transmitted to the plurality of smart terminals; distributing the fuzzing commands to the plurality of fuzzing nodes connected to the fuzzing, client depending on a distribution algorithm; and performing control such that fuzzing is performed by the plurality of fuzzing nodes in compliance with the fuzzing commands through the fuzzing client.