IoT devices use outdated secure methods that are vulnerable to quantum computer attacks, making quantum computing a huge security issue. As quantum computers get smarter, RSA and ECC may not be able to protect IoT networks as well. This research examines how publish-quantum cryptography (percent) may defend IoT devices from clean quantum assaults. Percent uses quantum algorithms like Shor’s and Grover’s to provide unbreakable safety. Records are protected and quantum technology is sent securely. The research evaluates many PQC algorithms for IoT systems. It uses computational energy, power savings, and scale troubleshooting. We propose integrating conventional and post-quantum encryption to make IoT networks more trustworthy and impenetrable. This study shows how important PQC is for protecting IoT settings against quantum-based attacks by securing key exchange, data, and device identification.