Non-contact human-machine interaction (HMI) systems that integrate both sensing and feedback capabilities are crucial for smart homes applications. However, the development of non-contact HMI has faced challenges due to its limited interaction scope and potential privacy concerns. Herein, we present an intelligent HMI system where the proposed easy-fabricated electret actuator is integrated with optical ranging technology to facilitate 3D-depth information perception and concurrently convey real-time audio feedback for action reminders. In particular, a broad detection distance exceeding 250 cm, accompanied by a detection range of 7.75° scanning angle is achieved. As a proof-of-concept demonstration, the real-time interactions of the recognition of moving object positions integrated seamlessly with audio feedback are presented, thereby providing a thorough evaluation of its potential for HMI in smart homes. Our work offers an effective strategy that broadens the application scenarios of thin film-based HMI systems, paving the way for promising avenues in HMI applications within smart home environments.