Abstract: Aiming at the technical problems prevalent in current elevator systems, including physical contact dependency in human-machine interaction, high retrofitting costs, and difficulty in rapidly adapting to special public health requirements, this paper proposes a non-contact remote control device based on the Internet of Things （IoT）. Adopting a non-intrusive installation method, the system uses a servo motor to accurately simulate button-pressing actions, thereby achieving non-modified access and intelligent upgrading of traditional elevator control systems. The research focuses on the systematic development and optimization of the structural design of the device, the software-hardware integration of the control module, and the stability of communication protocols. Functional tests, environmental adaptability evaluations, and experimental verifications in typical application scenarios show that the device exhibits excellent compatibility, responsiveness, and reliability. The proposed IoT scheme can effectively meet diverse application demands such as contactless control, intelligent elevator retrofitting, and autonomous access of mobile robots, providing a feasible reference for the rapid deployment of intelligent building systems and automated management of public spaces.