Abstract: In order to introduce the experimental content of visible light communication and improve the operability of the experiment, this paper developed a set of LED visible light audio and video transmission device. Based on the principle of visible light communication, we independently designed a dual-use video and audio transmission structure, and on this basis, we developed LED visible light communication demonstration experiments, transmission distance and communication quality exploration experiments, and light reception angle and communication quality exploration experiments. Practice has shown that the device is simple in material acquisition, convenient in operation, and intuitive in presentation effect, which can help students understand the essence of visible light communication in depth and play a good experimental teaching role.