Emotion has an important effect on our life; also it is a reflection of people's psychological changes. It is necessary to understand how mood affects our body. Combining wearable technologies with emotion sensing becomes an interesting area that is worthy to explore. With wondering, I wish to explore how human mood looks like, and whether there should be a wearable device that can give a visual understanding depending on a person's mood. This project explores a wearable device that aims to track human emotions and react to the wearers' changes of mood by changing colors of lights hidden in the device. The work seeks to enhance the understanding of the relationship between daily communication and emotions. The project intends on using wearable technologies that allow individuals to capture, identify, represent and visualize emotions, making a communicational visual wearable device and challenging the possibility of applying in interaction area.