With the intensification of the aging problem, many elderly individuals, both in families and those living alone for extended periods, are confronting challenges such as loneliness, social isolation, and communication difficulties. To enhance their connection with the external world and address their needs for voice companionship, emotional interaction, and mental and physical well-being, this study introduces an interactive system named “Digital Radio.” This system integrates a radio host, a voice-controlled sensor pendant, an external battery, and an application, aiming to provide the elderly with an easy-to-use interface and voice companionship. The system is capable of monitoring users’ usage habits, emotional states, and other relevant data in real-time. It displays emotional fluctuations and location information, which are derived from the frequency of use and the content listened to, within the application. Preliminary tests indicate that the system has been well-received by its users, not only helping to alleviate the loneliness experienced by the elderly but also strengthening their emotional connections with their families.