Eutectogels are emerging as attractive soft conductors for flexible wearable electronics and next-generation human–computer interaction devices owing to their inherent environmental stability and high ionic conductivity. However, it remains a challenge to achieve efficient multifunctional integration of flexible wearable sensors through a convenient and environment-friendly approach. Herein, the eutectogel with excellent mechanical properties, self-healing, environmental tolerance, reversibly fluorescent and high conductivity was prepared via a facile UV-initiated one-step polymerization. Abundant hydrogen bonds and multiple dynamic interactions impart the eutectogel with excellent tensile strength (1.99 MPa), high stretchability (>1500 %), high toughness (20.85 MJ/m3), strong self-adhesion (192 kPa), and autonomously self-healing (>92 %) capabilities. Due to the dynamic photochemical reaction of the anthracene groups, the eutectogel exhibits tunable and reversible fluorescence. The eutectogel-based flexible wearable devices and wireless interaction systems can be used for non-contact information writing and transmission, motion monitoring, wireless communication, and human–computer interaction, which achieves the working modes of digital and visual signals complementing each other as well as efficient multifunctional integration. Therefore, this simple and environment-friendly design concept can provide new ideas for the development of multifunctional integrated portable flexible sensing devices and wireless interactive systems.