This paper introduces the development of LED-based stego-panel. While this demonstration system displays dot matrix images through a CMOS image sensor, these informations are imperceptible to human eyes. Thus, this stego-panel can use interior illumination and transmit several messages to specific persons by using smartphone. The goal of this research is to add new values to LED illumination. We are developing prototype of the LED-based stego-panel and can provide new and exciting experiences for many visitors.